I have a question.... I have a two 79 F-100s and I need to replace the front fender liners. They are plastic and are cracked so I done some digging and found a Ford dealership in AZ. that still have them but they are metal. I have never seen front fender liners that are metal. Are these correct?? My only guess is that during production they had a running change in parts but like I say I've never seen any. Any info would be greatly appreciated.