Actually, the word is that Mike Pondsmith is currently putting together a new edition of Cyberpunk. Not the Fuzion rewrite of years past, mind you...an actual brand-new edition. Apparently with more focus on nanotechnology, though so far nothing concrete is known about it, including the release date.
At least, that's the rumor that some people on rpg.net gleaned from looking at Pondsmith's website.
That said, there were a whole slew of CP2020 books released by R. Talsorian, and some of them are probably still available via online stores. Used bookstores and/or gaming stores who sell used books (or just have a lot of old stock around) might also have some of them.
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it was a fun game
ryan