Bosconian is a great game and I really enjoy my Bosconian mini.
I have an UR Bosconian marquee. PM me and we'll talk.
Bosconian and Galaga share wiring harnesses (with a few minor differences), so find that may be easier to find. If you go the route of wiring the cabinet to JAMMA, several places sell the JAMMA adaptors (ArcadeShop, folks on ebay, Mike's Arcade I believe, and others).