I found a couple references to the score on a couple blogs. Here is a quote from somebody regarding the itunes release:

In searching for the soundtrack by John Barry, I was led to Wikipedia which states the soundtrack is available on iTunes. So, needless to say, I finally have a clean copy of the entire soundtrack! I still have my pristine LP from 1979, but the sound is much improved on the new downloads.

Here's another quote, this one about the Mask release:

"The Black Hole" is available on an Italian import (the label is "Mask," I'm not sure this isn't a boot), with FANTASTIC sound (it's better than the LP, believe it or not). It's coupled with "Howard the Duck" and a few other tracks. There is also a suite from "The Black Hole" that adds no additional score (although it has different variations on the main theme).

I may indeed check out a single track from itunes, to compare to the LP. I've never used itunes before; from what I've read elsewhere, 128kbps acc is roughly equal to 192kbps mp3, but I don't know how accurate that is. Even if it's true, that's pretty terrible as far as it being the best source available. Why remaster the music and then compress it down again just for itunes? At least if it had been released to itunes as 256kbps, as some music is now getting, that would be something. And that still doesn't solve the biggest problem: how do we get clean tracks of the missing music?