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[1HAMWANNAB]

I have abandoned the idea...  but the idea of set of three 572b tubes and a better power supply is interesting to me...

[KOP]

I't kinda starts here .
http://www.pwdahl.com/PWD_HamCatalog.html
Or roll your own . Or re-purpose a lump of, or outboard behemoth, or ...

Just do the work . Even something as "simple" as a HVDC half wave, full wave bridge, full wave doubler and filters can have its pitfalls .
I'll suggest multiple taps so you can experiment with output voltage if the supply is inboard, and or some headroom and a variac if the supply is outboard .

~kop