I don’t know what it’s called around here but I have paint to match canopy camper bed shell topper for a full size 8 ft bed currently sitting on a 2004 gmc Sierra 2500. It’s old has scratches all around and paint clear coat is fading on one top side. Notice my finger pointing at the driver side seam, it has separated from the base approx 3ft of the 8ft side and sags a little preventing one side of the glass to latch. Not perfect slightly damaged. It’s 20 plus years old. I might be able to find the cross bars in the barn somewhere let me know if you are interested. Cl chat on here please $100 cash I can help you install it comes with the clamps, if I can find the rack cross bars it will come with those also.