Wondering and making an educated? guess, I figured it had to be the P2XBL. I downloaded that bios and sadly found that dfi does modify their bios's.
I can only assume the company that made Savage Quest got those boards from dfi before they branded them with a custom Bios. ???
Anyway TrevEB later confirmed, that was the board and so it would seem that unless Stilleto can pull a 2a69kd42.BIN out of his hat, Mame would have to substitute or even rebuild the required file.
I personally think that TrevEB could do what he did again and get a good copy, but I don't know what that all entails.