I second the IPAC... but I got my controls from the Real Bob Roberts... he's a good ol' boy from Louisiana, great guy, been in the business longer than I've been alive kind of thing. Also got some stuff from HAPP Controls before I learned about Bob.

I'll leave it at that, though... MAME is a bit of a grey area legally. It isn't illegal itself, but you have to own PCBs of any of the games you want to play for them to be legal.

Bren R.