I bet you saw the serveral cheap new remotes on ebay like I did. They will not work on a 1997. 1997 is a unique year and the 1998-2000 2 button remotes will not work on our cars.
If there is another reason for your question then I will look up the 1997 part number, but the remote you want ain't on ebay.
Actually, I would love the exact part number for a two button remote head for a 1997. I've got a source for one aside from the dealer and need to get it just right.