Dunno if this would scratch your itch, but Sonic Wings Limited is one of the converted games for the Taito G-Net running a CF adapter. When I had my G-Net, I had no issues with SWL. Played great and with full sound. Would be a more cost effective option, and you get the rest of the G-Net library. Totally understand if only an original PCB would do it for you though. Just an idea.