James, check out this web site. I built a SLIGHTLY modified version of this that would give me volume and tone controll. Parts brand new should easily be under 20-25 dollars... I am working the bugs out of my new version, but if you would like a copy of it e-mail me at: KD5MSY@Yahoo.com
. I salvaged all of the parts for mine but the 555 ic, ic holder, and parts board off of a old TV board that I got for FREE from a tv shop, just go in and ask them. plus you can get some good crystles for 80mtrs. off them.http://www.rason.org/Projects/fmkeyer/fmkeyer.htm
hope this helps.