Hey guys, I recently picked up a 1985 k20 that needs a bed. I already had a driver's bed side, and I have found a complete floor assembly without too much looking. However, the passenger bed sides (with a square fuel door opening,) are all but non-existent. Everyone I've contacted says they are on backorder, and they have no idea if or when they will be available. I'm looking for part# GM1757104 or 15628616. Any ideas of where I may be able to get my hands on one of these? Thanks in advance!