I've got several of the CD's, so I know you used to be able to buy them.
I can find a page that offers some older CDs from past collections. That is it for CDs that I know of. But as is widely thought around here, I don't know everything...dunno where they got that...lol! Zubaz has the best answer, I'd say!
https://www.wincustomize.com/store/?type=librarycds
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