Back when the earth was ftill flat (say 1970's) SK xxxx series devices were RCA's line of generic hobby/replacement semiconductors (also the letters "RCA" on the device are a tip off). Similar was Motorola's HEP xxx series and Sylvania's ECG xxx series of generic replacement devices. If you had a circuit that called out a JEDEC 2Nxxxx (transistor) or 1Nxxxx (diode/rectifier) or TIPxxx (Texas Instruments Plastic transistor, of even a Japanese 2SAxxxx, 2SBxxxx, etc. you could look up a generic replacement w/ similar/better/higher specs.

NTE is perhaps the only one still in this game.

NTE 139A = 1N4739A
zener, 9.1V, 1W, 5%, DO-41 glass case, only $0.14 ea for Fairchild at Mouser (cat #512-1N4739A )

Who said it was N.E. area? Actually it appears WFEM-FM (92.1 MHz, apparently long silent/off the air?) was formerly located in Ellwood City, PA near Youngstown, OH. Not sure where 106.7 MHz comes in.
In any case it appears the places to look would be 47 CFR  Part 73:  Radio and Television Broadcast Rules, particularly Subpart G: Low Power FM Broadcast Stations, & Part: 74 FM Translator and Booster Broadcast Stations.

Currently (since Sept 1996) FCC has WFEM-LP (formerly W12BU) assigned to a low power VHF Class A TV station running 0.123 kW ERP on Ch 12 from a 61 m AGL tower (~154 m HAAT) in Heiskell, TN (off I-75 NNW of Knoxville, TN)

http://maps.google.com/maps?oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&q=36%C2%B0+04%27+21%22++-84%C2%B0+01%27+18%22&um=1&ie=UTF-8&hq=&hnear=0x885c38d54a24c811:0xf33cac288f4aa21f,%2B36%C2%B0+4%27+21.97%22,+-84%C2%B0+1%27+15.81%22&gl=us&ei=u81kT7OjPOnn0QHDyJC_CA&sa=X&oi=geocode_result&ct=image&resnum=1&ved=0CCQQ8gEwAA

I expect the Society of Broadcast Engineers should be able to help your friend out in his endeavors, alternately perhaps a Part 15 unlicensed FM transmitter could be an option , but for FM broadcast band, among other limitations, 15.239 limits one to a very low measured signal "... not exceed 250 microvolts/meter at a distance of 3 meters" so he'd not cover a lot of area! So it goes.

For TX: 123.0 Hz for K5SOH, Rosehill, 29.680 or 192.8 Hz for W5DFW, Fort Worth, 29.660
More in midwest w/ no tone req'd:
WY: KJ7AZ, Rawlins, 29.640; KC7NP, Cody, 29.680
UT: KD7BA   , Salt Lake City, 29.660
NE: WBØQQK, Bellevue, 29.640; WBØIEN, Hooper, 29.660
CO: WØTX, Denver, 29.620; KXØE, Colorado Springs, 29.680

There appear to be no 10m machines in NM, OK or KS, but there's about 60 others in North America w/ no tone, so that may be your best bet, short of a newer 10m radio.

Noting that the question was about MOUNTING HARDWARE for automotive form factor lead acid batteries in a 2007 Jeep JK, not about the limitations of lead acid batteries when used for non engine starting power supply applications in automotive type vehicles, I might suggest a Google search for "Jeep dual battery tray" or similar, as this generates a list of Jeep vehicle specific battery mounting hardware as well as some installation examples w/ photos and commentary. Sorry I cannot offer any first hand experience.

Alas, this thread seems to have wandered off the subject of mechanical considerations and specific hardware experiences in mounting multiple lead acid batteries in Jeep (or other) brand on/off road vehicles; not to say that the discussion of the electrical limitations of automotive batteries, their care and upkeep, and the capacities, the limitations of automotive charging and wiring systems and charging/discharging management of multi-battery vehicle systems isn't also interesting in its own right.

If aluminum is involved Ideal's Noalox, GB's OxGard, or other aluminum wire (e.g. service entrance cable) anti-oxidant paste/grease would be the way to go. Available at any building supplies, electrical supply wholesaler, or good hardware store.

Stock antenna on that radio is pretty good, but I use a Pryme RD-98 on mine, (also sold as a Comet SMA-24); it's a thin & whippy 17"). The Diamond SRH-77ca (15" and slightly stiffer) is comparable to the Pryme/Comet, but makes the radio slightly top heavy, a possible issue if you leave it stood up a lot, probably a non issue if worn on a belt or other w/ its clip. Look for something in the 15-18" long range and you should be good. 

Is this a Wouxun battery pack design issue, i.e. only 5 AA cells (6V w/ NiMH) vs. 2*3.7V=7.4V Li-ion in their rechargeable pack?

I have no trouble w/ 6 AA NiMH's in my Yaesu FT-60r "alkaline" battery pack vs the factory 6 NiMH pack, in fact my 2100 (2200?) mA-hr cells slightly outlast the factory 1400 mA-hr (now shipping w/ 1800 mA-hr?) pack, but I'd expect 6 alkaline (nominally what: ~2800-2900 mA-hr?) to fair worse, at least at 5W Tx, due to their higher internal resistance, though better if used just for Rx.

Also: it's my understanding that the low self discharge Sanyo eneLoops have slightly lower internal impedance than conventional NiMH's -- so should be slightly better than their mA-hr rating would imply in high discharge current applications (e.g. HT's, digital cameras & large camera flashes) though I've not tried them yet. Anyone have side-by-side experience w/ th eneLoops vs. regular Sanyo or other NiMH's?

"NTIA further proposes that the amateur transmissions on these frequencies be limited to single sideband (upper side band), suppressed carrier (SSB-SC) voice (emission designator 2K86J3E) centered around the above frequencies, and must not exceed the equivalent of 50 W PEP transmitter output power into [at the feed point of...] an antenna with a gain of 0 dBd."

[I'd assume/argue if questioned on the point that 0 dBd (2.15 dBi) was an ideal (resonant
1/2 wave?) dipole in free space]. I could be found wrong I suppose, but it seem a good starting premise given the vague wording of the regulation and the standard mathematical practice to use either an ideal isotropic radiator in free space or ideal dipole in free space (which ultimately is based on the the ideal isotropic radiator).  I'd also argue that the 50W PEP is at the feed point of the antenna, it would make little sense to specify it elsewhere, so for long or small diameter, lossy, or badly matched feed lines the calculated or measured line loss could be factored in if power was measured at the Transmitter end of the line.

"For the purpose of computing e.r.p. the transmitter peak envelope power will be multiplied with the antenna gain relative to a dipole or the equivalent calculation in decibels.  A half wave dipole antenna [in the vicinity of the real earth? "vicinity" perhaps construed as being 0m to 60m (0 wave to 1 wave) from the earth's surface)] will be presumed to have a gain of 0 dBd."

(I'd argue, if questioned, that they appear to be considering, for calculation purposes, a real [1/2 wave] dipole in the vicinity of the earths surface to also be 0 dBd (2.15 dBi) -- certainly make practical compliance calculations simpler while accomplishing the nominal goal of not overwhelming the primary (US Gov't) users with excessive power.

If indeed your doublet as mounted has 0.4 dB of gain relative to a dipole, and your feedline has say -0.2 dB of "gain" (0.2 dB loss) then you find yourself within a couple tenths of a dB (a couple watts at 50 W nominal) of the regulation, +/-5 to 10% power measurement error so certainty within the spirit of the law and operating in good faith. Crank it up to 100W, or even 75W, I'd say now you're outside the spirit of the law.

That's the way I see it, and would argue it if acted to do so (as unlikely as that event is), for what it's worth.
 

try McMaster Carr   http://www.mcmaster.com/
Alternately,
Lee Spring  http://www.leespring.com/
Century Spring   http://www.centuryspring.com/
Barnes Associated Spring   http://www.asbg.com/

"Why not take it back to the dealer under the warranty?"

Because they've been out of production for what: 10-15 years? FT-5300 was originally introduced circa 1993? Time to find a used FT-7100 or better: FT-7800R?

Alternately, look for a service manual: http://www.imarksweb.net/book/yaesu+ft+5200+service+manual/
Second one may have a blown final (*NO* Tx either band, right?), they apparently were under-cooled. Perhaps salvage the final from the first (UHF Tx fine?)?

I'd guess 23cm would be more popular than 33cm for manufacturers, as the market isn't limited to the Americas (Region 2) -- same problem 1.25m has vs. 2m & 70 cm. Perhaps a 2/1.25/70/23 quad band HT, maybe 1-2 W at 23cm? Trick would be to be the first to market (Alinco or Kenwood maybe?), not sure the market would be big enough for two manufacturers at the moment, but 5-10 years out, with the ever increasing use of high band UHF (800+ MHz) for Public Safety, etc., who knows.

Also: "Red Right, Tongue Top" looking into the mating end.

It should be noted that for Pb-acid batteries the published A-hr rate is generally based on a 20 hour discharge... the actual capacity for a few hours to fully discharged may be only 70-80% of the twenty hour rate (due to greater I^2*R l losses from the higher current thru the battery's internal impedance [R]), You might, based on an initial estimate of 3 hours, assume 0.75*50 A-hrs (call it 37 A-hrs in round numbers) or just assume 0.75*3 hrs or 2 1/4 hours. Actual trial will give a better real life answer, the calcs. give you an initial estimate though.

For NiCd & NiMH (and Li-ion?) cells the capacities are generally based on a 5 hour cycle, but the de-rating is likely similar, e.g. 1 vs. 5 hrs for NiMH is probably similar to 4 vs. 20 hrs for lead acid.

See manufacturer's detailed/OEM spec sheets for capacity vs. rate graphs.

You mean CO alarm? (Corbon Monoxide, vs Carbon Dioxide)
AC line (likely w/ battery backup) or battery powered CO alarm?