You only have two options....
1) find someone to deactivate the TPM system from the onboard computer (which you already said Ford wont do)
2) put the TPM's back in the wheels. You may be able to get a compatible valve mounted version.
I dont see any other options. The TPMs have to be "rolling" for them to transmit to the car. thats why putting them in the spare won't work.
Try slipping the tech at the dealership a $50.