Why don't you get the surrounds from the AC3 soundtrack of one of the foreign releases (which *didn't* have this particular "creative decision"

It's a nice idea... but personally I don't think it's worth the effort. I still can't hear any problem with the music (though perhaps a "correct" mix would sound better), and it wouldn't be as simple as dropping in the rear channels from another country's DVDs - the echoes in the Death Star (is that what you meant by the chasm, ADM?) would still have to come from the English soundtrack, for example. I know there's a lot of leakage of dialogue from the center to the fronts, but I'm not sure about the rears, generally.

If anyone does try, bear in mind most foreign countries use PAL/SECAM, so you'll have to resample at a ratio of 1:0.95904

Better to wait for the next DVD release, which will probably have all these "creative decisions" reversed