I'm Mark, the guy who did the arrangements for Wing Commander on the Amiga/CD32 back in 1992. It was actually my first fully paid game job when I was 19, so is very close to my heart. Glad to hear the positive comments about it. It was no mean feat getting that into the 4 channel Amiga, and with huge memory restrictions.
I've uploaded the original .mod files to my website, so you can all download from there. The file is under 2 meg, and they'll play in any of the tracker players/plugins (I think) although Oldsk00l for Winamp is recommended.