I have finally managed to subscribe to a usenet-account, and downloading from a.b.starwars works like a charm... so thanks for upping the isolated tracks.
@Tim:
Both AOTC and ROTS used some of TPM's music, so maybe it is possible to reconstruct it. Furthermore I've got a rip from the AOTC-soundtrack taken from the rear channels of the DVD. It is called "Ultimate Edition", but of course it's not official and contains SFX in some parts. But maybe it's good enough to fill in the missing bits.