Hi there. We are after a Sega System 18 main board. The exact board revision that I'm after can be found with these games:
Alien Storm
Clutch Hitter
D. D. Crew
Desert Breaker
Laser Ghost
Michael Jackson's Moonwalker
Where's Wally!
The board doesn't need to be fully working, just as long as it lets the game boot (in other words I don't mind if it has graphics or sound faults).
However, if at all possible we'd prefer one that's fully working.
Thanks.