SPC rips of them would be fantastic (I would transcribe them to MIDI in a flash), but I think if you were to do SPC rips, it'd be best to do the whole soundtrack, using the SPC set
here as a guide to all the tracks that need to be ripped (as far as possible). It'd hardly be a quick job, especially with trying to dump at the beginning of tracks, and also avoiding sound effects. It's just, there may be slight differences in other tunes that you (dare I say it) haven't noticed thus far, and well.... I dunno, huge vgm geeks like myself are kinda anal about things like that
. Also, I guess there's an outside chance that there's more unused music hidden away in the game but not used during game play - of course, that'd require some light hacking, and you're (understandably) not so comfortable with releasing a ROM after paying out the ass for the game.