"All" Atx psu should have -5v (pin20/pin18 check the pinout).
Otherwise the standard recommendation is a meanwell psu (rt85a i believe). You can get them from Ebay (not sure regarding fakes) and Digikey which seems to be the cheapest option if you order over 50€, otherwise their porto is...
Hi,
I'm looking for:
WakuWaku7 original (glorious MVS not trash AES)
Knight Boy [boot] (would also take a criminally cheap kiki kaikai)
MIght also be interested in a "Tokimeki Memorial Taisen Puzzle-Dama" + MB but haven't checked prices so I'm not sure yet if it's worth it to me. (Dear Reader...
Twistedsymphony the bane of the "poor" arcade collectors, ruining the prices of the last remaining cheap boards. Somebody stop him before he gives us a KONAMI MYSTIC WARRIOR Multi and ruins the price of Martial Champion or something equally horrible!
More seriously: kinda a shame about Gundam...
Could you switch Roms/Pals/whatever on the Donor to make it a stable Base Version and your custom has less variants to handle? (I have zero idea how much work that would be)
Could you offer different versions for different donors? You already stated you want to use the concept for different...