If you mean the music from Jazz Jackrabbit 3
, I've actually wondered the same thing myself. In the past, VGM's policies on unfinished games is not to upload, but I don't think that necessarily applies to unreleased games (especially if it has a finished OST, which JJ3 does).
Of course, any soundtrack from Alexander Brandon is worth hearing, and both Haunted Terrero and Hopteego Village are sweet tunes (although I still wish he'd used a better slap bass sample on Hopteego). I can think of any number of people here who would appreciate midis too, myself included.