I tried, the tape is playing but still ignore the end of tape time (No OK).
I just compared a BASIC program saved by M.E.S.S. turned into .BIN via WAV2BIN to a .BIN of the same program produced by BAS2BIN. It's official now: .BIN files generated by BAS2BIN lack an extra byte at the end.
If you somehow manage to add an extra 0x00 byte at the end of the .BIN file, you'll be able to turn it into a working .WAV file.