Seat swap possibility

First gen sebring convertibles (96-2000) use an inertia module located under the console to lock up the belts in case of impact or loss of battery voltage. Second gens (01-06) work like you describe and do integrate the old style lock up retractor in them as a backup incase there was a loss of power before impact. Other thing to keep in mind incase on your search you have trouble finding decent ones is the bottoms will swap side to side.