Not really feasible.
Basically, you'd have to remove the PATS module and install the necessary plugs that an export car would have had. Then you'd either need to replaced the PCM with a non-PATS version or have the current PCM re-flashed to a non-PATS flash.
He'd be better to get at least two PATS keys and have them programmed into the PCM by either a well-equipped locksmith or a Ford dealer.
Steve