There is a BBB for sale in Europe and the are asking bids starting at 18K (Euro).

I never understood why Gene took the difficult route. He knew it would be hard to get the Capcom boards, or specific chips, replicated. He took that route since he saw a huge market for Capcom spare parts. Not sure there is so much demand. I think it would have been way cheaper to just reprogram the whole game for a different platform. Then Stern or JJP, or who knows may step up, could easily take both BBB and KP in production, if they would want to.