My old house has a garage door system that must have been 20 years old. It has been working fine for many years. But recently my car got broken into and the remote is stolen. I have no way to re-program the currently one as it's the only one I have and I don't know if it's taking a new code or not. Also there seems to be no replacement in the market. My model is Sears 139.654021
Question: The whole system including motor and chain are working fine. How can I just replace ONLY the console and its remotes?