I think I know what you talking about. I believe it's the molding with a chrome inlay. It's notorious for fading and peeling as to where to get any for a 83 bird I'm a little stumped. Some parts stores sell some that may be a close replica, or possibly try a dealership. Dealers sometimes use the services of people who come and do touch up (paint, spoilers, dent removal, etc.) work right on the lot. They may could help you. Hope I was some help.