Some time ago, I saw a 1st-generation Dodge with a 2. 5-3" sleeper-type cab extension that was mounted in the bed and accessible through a door in the back. I think it had a couple of sideways-mounted jumpseats and sealed to the back window of the truck like a lot of camper shells do. It looked kind of like the front end of a camper shell with a commercial-style full length vertical door on the back side. Does anyone know who makes these? I have a 2001 RAM2500 5. 9CTD regular cab I would like to put one in.