92-97 S-10 Factory stuff should work, along with a bunch of others, just need a readily available harness adapter. Don't get Monsoon or Bose, I hear. On E-bay, I searched Delco CD players and came up with something like 143 items. HTH.
Go on eBay and look up "GM CD radio" and look around for a few days or weeks and you'll get a nice one for a good deal. Mine was out of a 02 Yukon. You'll need an adapter for the harness and antenna but it pretty much bolts right in. Make sure it's unlocked with the security code. They sound way better then the stocker that's for sure!
I have a MINT AC Delco AM/FM/CD radio for sale. I bought it on EBAY for $300 last year, never installed it and will sell for less. I decided to keep my car stock. If you are still interested, I can send pics.