You could always go buy the Ron Jones soundtrack collection. That's got all the BOBW music on it - you can even purchase the individual tracks from Amazon...
The Ron Jones soundtrack collection actually does not have the BOBW score on it (aside from a few short cues). You'll have to buy it on its separate release, from GNP.
I also was hoping for an isolated score but I'm not surprised it wasn't included, given the politics involved.