1971 rear bumper urethane filler?

I have two cars..both are 73's. One of them I am installing a 71 tail panel and bumper in and I have a question. On the 73's there is a urethane trim panel that fits up under the rear quarter corners, and across the top of the rear bumper, covering that spot between the bottom of the tail panel and the rear crossmember. Did they use this trim in 70/71? I cant find it listed anywhere.
Author: mbolin05