Only (thankfully) through torrents, but needless to say that is not legal in most jurisdictions. Most of her works are now not available for sale except for second hand vinyl or CD.

This includes the four Switched-on albums, as well as such rarities as her collaboration with "Weird Al" Yankovic: Peter & the Wolf/Carnival of the Animals – Part II.

I think the excellent and dystopic sounding Clockwork Orange soundtrack is available digitally though.

Also somewhere on archive.org. Not sure about linking to it from here, but should be easy to find using their search. Quite surprised that it's not on streaming services!