There are tons on ebay.
Just be warned. Apparently the square ones are the ones to get. I replaced my broken ones with refurbished "peanut" shaped ones, which also promptly broke. I seem to recall there even being a TSB on this.. I could be wrong.
I've been remote-less for about 3 years now, and I haven't really missed it.
My 98 I just bought didn’t have any remotes so I ordered 2 new ones off eBay with shipping they cost me $47, arrived in 5 days, and took 60 seconds to program..
http://cgi.ebay.com/ebaymotors/ws/e...0582804011&viewitem=&sspagename=STRK:MEWNX:IT
This is the guy i got mine from for the 98