One of the problems you may run into is many dealers are no longer providing the necessary information based on VIN. They have closed off access to the system except for in-person service. This was due to (and it was reported here on RV Net awhile back) criminals were accessing the databases through employees at dealerships and making duplicate keys for cars they intended to steal. As a result, some dealers will not allow access unless it's being done at their dealership or though some form of authorized contractor. Fred the licensed locksmith may not be able anymore to get the information they need to do the work. Now, this is only when you don't have any of the original or a clone fob.