You know, I've been having the same problem.. looking for a driver's side quarter panel. But if you got a welder, there are panel patches that are sold at: brotherstrucks (a little expensive), LMC,
www.truckandcarshop.com, and other part stores... Otherwise depending upon where you are located, there are a few fellas in here that got beds for sale, they are just too far for me. I'm in southern cal and the midwest is just too costly in shipping.
Good luck!
