if you cant find the answer here go to LHforums.net
its a forum for the intrepid, 300m, lh chrysler vehicles.
im sure they used the same heater element in the 300m heated seats, and the intrepid guys LOVE to switch out the intrepid leather seats for the 300m HEATED leather. im sure someone probably has a heater element they would sell you as well.
im a member over there too. just tell em i sent ya.