Shadowkahn1234

Hey folks. I have a 2007 F150 Super Crew. There is a narrow black trim running along the top outside section between the roof and windshield. This trim is cracked and peeling. There is a white layer exposed under it. I have checked with body shops and glass shops. No one seems able to help me. Can anyone give me a suggestion as to what to do. Where can I get the trim and can I replace it myself? Any help you can provide will be greatly appreciated.