If you're looking for a collectible grip, that's one thing. But if you're just looking for a good grip that will fit, try CDNN. Here's their URL: http://www.cdnninvestments.com
Check your next local gun show, too: they generally always have used grips, new grips, and a wide variety of what you'd need.
[This message has been edited by Walt Sherrill (edited October 16, 2000).]
CDNN has a lot of grips too. I almost forgot to tell you to try the auction sites like yahoo and such. www.auctionwatch.com searches a bunch of them for you. Try a search string like: smith wesson grips or S&W grips. This should return a bunch of items.