You could try and find a set of credits and it might tell you who did the music. Then you just do a search of the person who did it in hopes of finding a website they created where they might've posted a mod/xm of the song, since that's the format they are usually created in.
Forget the credits. go there: http://www.zexersoft.com/products.html and get a copy of midi extractor. It has a time limit of 30 days. More than enough. Just choose a directory (like D:\) and let the prog do the deed.
Have FuN. If ye got REAL nice midis, would be nice of you to share.
By the way, mentioning keygens in the forums should be avoided, it might throw some doubt about your probity...