Sadis

i HAVE A 2004 Ford Mustang. AFTER I purchased the vehicle I found out the car had originally been a standard and its previous owner swapped the engine&transmission to an automatic. They didn't change the PCM to match. I purchased the correct pcm but it needs to programmed for PATS. Problem is Ford is telling me I need the VIN of the car the engine and transmission came out of in order to program it. I can't get in contact with the dealer. Is there anything else I can do to get the correct vin to successfully complete the program?