I can't believe it's not on CD yet

Check on Amazon. I found collections for all three that you mentioned.
A possible complication is that while the composer owns the rights to the music
the film production company owns the rights to the original recordings. So
sometimes the music must be re-recorded. Or you can make your own compiliations
from the original soundtrack recordings.

Richard Shores' scores for The Wild Wild West and Perry Mason
The Hershel Burke Gilbert "galloping" arrangement of the Gunsmoke closing theme
Nelson Riddle's incidental music for Batman
Luc Glusken's music for Have Gun - Will Travel
The score for They Came from Beyond Space
Elizabeth Berens' score for The Earth Dies Screaming

Je suis Charlie Hebdo.

A 2-CD release of the original soundtrack to Raiders of the Lost Ark, music composed and conducted by John Williams and performed by the London Symphony Orchestra, the original and arguably the greatest of Indiana Jones' big-screen adventures, with every single track laid out unedited and in film sequence, including the shock pieces when Marion is thrown into the Well of Souls with Indy and she discovers she's in a chamber filled with mummified corpses, even the Arab incidental source music that is playing in the streets of Cairo and in the bar when Indy has a conversation with his arch-nemesis Belloq, would be great!

That score is a masterpiece with a lot of sonic and ethnic flavors! It should've won John Williams yet another Academy Award, but it was beat out by Vangelis' Chariots of Fire.

This might seem a bit odd, but Howard Goodall's score for Mr. Bean's Holiday is very under rated and hasn't had an official release in any format. I have no idea why. Have a listen, it's wonderful: https://www.youtube.com/watch?v=0_QMtvFqP5U

Keep Calm and Cary Grant