I believe I have a fully tested, working, ORIGINAL MIDWAY Pac-Man board (with the fast pac mod--one that I could replace with the original speed). I need to double check to ensure I havn't already sold it and forgot though.
$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.
But the other poster is correct. So long as they didn't put in a pirated/bootleg Ms.Pac board or done horrible hacks on the board to run Ms.Pac illegally, then you don't need a new board. HOWEVER you do need to replace 6 chips on the board to play pac-man, and remove the daughter card and move the CPU back to the main board.
I can post info if you need it. However a complete picture of your board would be needed before I could provide any help.