I may have one for sale. I bought a star wars cab a while back that was converted to a Wonderboy (
thread can be found here). The board works great, and I only purchased the arcade for the cabinet (I like Wonderboy ok, but not enough to have a dedicated cab probably, and definately not in a star wars cab).
I don't know what to sell it for though, how much are you thinking? You can PM me if you'd rather. Also, I've never mailed a PCB, and it still makes me a bit nervous (I also have a battlezone board set and beast busters board set I need to sell, but I'm not 100% sure how to mail a PCB).