I have 54 Chevy Truck. what is the metal piece of hardward on the inside of the door near the inner cowl that holds the rubber trim around the door. The last 6 inches of mine is gone-eaten by rust. This piece seems to be welded in place. If there is such a piece that can be purchased where? what is it called? And does it have to be spot welded in place or can it be riveted?