Due to my own laziness, I´ve listed only the CDs. :)
Most of these albums contain the original recordings used in the films. But there are exceptions: Che! , The Amityville Horror and Cool Hand Luke are only available as re-recordings, done by Mr. Schifrin himself for his Aleph label. There are two albums for The Fox : The new recording on Aleph and the old LP program on Warner France. Bullitt was issued on three albums, each with a different recording.
Label X released an expanded edition of The Four Musketeers, but it seems that the new tracks have an inferior sound quality. And of course not all of these scores are still available: Brubaker (on Intrada) and the complete edition of Enter the Dragon are long out of print.
Missing from MUBI:
Gone with the Wave
El Quijote de Miguel De Cervantes
Something to Believe In