Dunno; I've just looked online and see what you mean – most versions out there have a different cover. Hmm. Discogs claim to have a few on sale including one for about $2.50 so it doesn't seem so. Well perhaps it's slightly rarer now I've got JP to scribble her moniker on it!
Am I the lone person here to think that this score runs rings around most contemporary stuff? It may underscore a documentary, but it could just as well have been for a (high quality) thriller. Kudos to Bruce!