I wonder if there's some feud between Casablanca Records and someone else that is preventing the release of some of these original albums? Jesse would probably know. Most of the early Donna Summer stuff is missing as well.
I have vinyl. I have quite a bit of Casablanca vinyl. I also have some Sugerhill Records stuff including the very first rap song -
Rappers Delight. And the first 2 Prince albums - which you never hear - but include my favorite Prince song "Let's Work".