http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=34209&item=4532011303&rd=1 are these available from GM ?
Nope, not any more... I bought (what I'm pretty sure was) the last pair last year when I was doing all my parts hoarding and had an "in" at a local dealership. He would run a bunch of numbers on the parts locator, print out what came up and I would call whichever dealer the stuff was located at and buy whatever it was I found.