I'd been searching for ages for the awesome OST to this mod, but besides a few scattered Youtube videos (which are hardly the highest quality), I'd never had much luck. Fortunately, I found all the song files in the full mod pack. Considering it really shouldn't be necessary to download several hundred megabytes of game files just to get at 4 and a half songs, I made a Drive folder with them.

Update: Google killed the old link following a security update, here's the new one: https://drive.google.com/drive/folders/0B3qPD-XhpPJYcWRWSFNVTVV4QjQ?resourcekey=0-ebQkf6CPbkRuqwrPVT9zFQ

Please let others know about this so they can enjoy it!