Remember the Jamma are pirate boards (and if they're "new" they probably Mame running on a dedicated PC board with a compact flash drive.. (in other words crappy emulation)).
As far as extra boards, I actually have some. I cannot ship overseas, but I do have a few original Pac-Man circuit boards with the speed up modification. Plus I have a normal speed "Pac-Man Plus" board with daughter 'blob'.
They are fully tested, working, ORIGINAL MIDWAY Pac-Man boards. $190 including UPS ground insured, trackable shipping with signature required delivery to any of the 48 continental states in the U.S.
I also have a Pac-Man Plus board available for $180 shipped with the same terms as above. (This is the one with disappearing ghosts, pop cans and grape fruit, maze disappears, etc.. the followup to Pac-man. Same Pac-Man board but with a daughter card (blob) and new game and graphic and color PROMs.