Years ago, many companies in the aftermarket relm offered some bed rail caps for older body style Dodges, Chevys, and Fords. I have looked around for a company that sells a complete set (2 side rails, front of bed, and tailgate)... ... ... no luck. All I seem to find is the 2 side rails being offered. I would like to find something in polished aluminum or stainless, and or diamond plate. Anyone know of a source? 
