UPDATE: Still Available.
(10/24/2019) Another wagon-into-trailer modification.
https://madison.craigslist.org/pts/d/sparta-1948-willys-camping-trailer/7308066365.html
“Willy’s station wagon made into camping trailer back in the 50’s. Been saving it to restore an pull behind my Willy’s station wagon or truck, but time to let someone else enjoy it. Has the rare, hard to find, ‘ barn doors ‘ in back. Will need metal work, but it’s mostly flat panels on body and frame. $1500.”