There is one on Ebay right now that the auction ends in 5 hours. No bids and the asking price is $50.00. $hit it is a drivers side mirror. They are on Ebay pretty regularly. This is the older style mirror. Is that what you need or the butterfly style mirror?
Also, PM gmpartsdude I think thats his name he can get you factory replacement parts at a very good price, alot of the members have used him and they all love him.
I looked forever for a replacement for my passenger side mirrior both on ebay and other sites.... they are were selling drivers side... i guess passenger sides are the ones that get clipped all the time.... I finally ended up buying mine from my mechanic since he upgraded his to the newer heated style... which i will do eventually as well...
I upgraded my 97 mirrors to the butterflys. Got a new harness for them. Only thing is the heated part doesn't work. The rest works perfectly. I have my original mirrors but will put them back on the 97 if I sell it so I can move the butterfly mirrors to the next one. I can't see out of the old style mirrors at all.
