2015 Lincoln Navigator Seats

Second row passenger side captains chair seat latch that secures it to the floor is defective. Metal teeth somehow are worn off prevent the seat from latching to the floor. Huge safety issue for this as it’s mostly kids sitting in the back that may not even notice or say anything. Makes me nervous how many people in navigator and expeditions are riding around with defective seats. Called the dealership to get a replacement part and was told it would need a new seat frame. $3400 for a seat frame is beyond outrageous. I can find used seats, still not cheap, but my concern is this will be the same issue.