I know someone makes plastic gap fillers that go in there so you cant see the gap between the frame and bed. But, I havent seen any for the entire wheel well. I have seen alot of people use do it yourself bedlinear in there and that does a very nice job :rockin
Good question! I have always wondered why GM didn't put in rear inner fenders. So much salt and crap gets kicked up there, that it rots out quick if you don't keep it flushed out! I would be interested in buying some also, if someone knows where to get them. Coating inside fender with bed liner IS a good idea!