FYI, the original Dune video game music was not created by Frank Klepacki. Exxos (Stéphane Picq and Philip Ulrich) of CRYO Lab Studios are the true artists (Westwood had nothing to do with this game; CRYO were the developers).
The rare official soundtrack 'Dune: Spice Opera' has become quite valuable, and for a good reason besides its very limited run packaged in a 'special edition' of the game. You can find it in MP3 form at … well, it used to be easy to find but now you'll have to trawl the P2P system (or Google a bit harder than me ).