So here we have the reason why we are not getting separated music-only tracks on the BDs.
I can think of only one tv show on Blu ray that has seperate music tracks and that's The Twilight Show. It's a very rare special feature. You can roll your eyes, but the fact is that the chance of these soundtracks being included was pretty much non existent from day one.
I wonder if this is worth getting when you already have the original GNP releases and the Ron Jones Project. It seems that I already have the complete score if I combine the cues from both releases.