These are still copyrighted recordings, and they seem to be available in the usual places you would find copyrighted digital audio.
Her work is not licensed for digital distribution, and largely out of print.
So, there's unfortunately no way to compensate her directly for her works.
And "work" is an understatement. Moog synths of the day were barely instruments. Imagine playing a symphony (symphonic arrangement) using only a single glass filled with water.
You could get any note you wanted, but only one at a time and even that required constant retuning.
Yes, Discogs is basically the IMDb of musical recordings. Its marketplace is probably the best place on the internet to find and sell physical copies of pretty much any musical recording.
They don't sell or host digital recordings, presumably for copyright reasons.
Ripping these original vinyl editions is already somewhere on my list of things-to-do-before-I-get-too-old. Currently I don't have a functional pickup for my record player. I will get around to it, some day. The Switched-On Boxed Set (CDs) was released in the late 90s, and I happen to have ripped that one about 20 years ago. I should do another FLAC or high-quality AAC rip of that box, for posterity, before eventual CD rot happens.