I have the '77 restored mono and the '77 Dolby Stereo mixes. The '93 remixes can be ripped from the GOUT discs, but if you were looking for the uncompressed audio from the Faces/DC laserdisc PCM tracks (converted from 44.1 to 48kHz) then I have those too, for all 3 films.

I don't know if these are already uploaded anywhere; I could upload if no-one else comes up with some existing links. (OT question: if you upload to Rapidshare, and you don't have an account, do they delete the files after a certain amount of time?)