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im sure you can install a power track to the passenger seat or yank one from a junk yard~ the plug is probably under the seat or carpet its just not used (worse case they didnt put a wiring harness plug under the passenger seat or it differs with heated seats)
and you will probably have to either replace the seats for ones with the heating elements in it unless for some odd reason ford put the heated elements in all the seats, just didnt hook them up~