There are a ton of (fantastic) TV movie scores languishing someplace in studio vaults that may never see the light of day due to disinterest. It's just not fair.
As for features, all that's really left that I'd like is The Best of Times.
I agree with all of you, but as someone said "life isn't fair". Seeing the thread title my first thought was Bernard Ebbinghouse, who did "Prudence and the Pill" around 1967. I really enjoyed that LP but it never made it to CD. It had a bright yellow cover as I recall. I know I've gone off on a tangent... sorry about that. I really like Arthur B. Rubinstein too.
I hope for a compilation album featuring music from all the John Badham movies Rubinstein scored. They did 9 movies together so there are lots of music to discover, some of it is still unreleased.