I'd be more interested in hearing what Dax or Gibs can do "remixing" the original (Speccy) version of the tune in an Amiga tracker rather than .mp3 format...
That would rock.
As for the original AY music, I'd probably see about isolating each chip-sound as a sample and building in a tracker from there. It could be done, I think - get an emulator (ZXSpin can do it) that can reduce the individual channel volume for A,B and C and record those. Time consuming, but possible and would sound quite good.