FBA-320 requires 0.2.96.86 and FBA-GCW requires 0.2.97.35. Now I really got into it a few weeks back and spent a day or two sorting out the rom sets and according to CLRMAMEPRO they are 99% correct.
I'd be happy to share but I don't think I can link to them here....if there's any interest I could PM a Google Drive link?