UPDATE: Status Unknown. Was $450.
These might be based on the Koenig bed extender (see a variety of extenders here). I’ve not interacted with the seller and have not seen one in person yet. Has anyone ordered one of these?
“Listing for a friend that is not on FB. Built Willys Jeep Extend A Bed. 7 cubic ft more room!! Will fit CJ models 2a, 3a, 3b, 5, 6. I had this made exactly from an original 1946 extend a bed. For sale is the base and sides only. Included are nuts and bolts for mounting. Price does not include shipping. Send me your address for shipping quote. Local Pick up is available. These are made to order.”