Mark spotted this trailer. Has some rust, but could be worth a look.

https://charlotte.craigslist.org/tro/d/shelby-1940s-spen-willys-jeep-trailer/7268333712.html

“1940’s Spen Trailer in Good Condition. Scarce Spen trailer with even scarcer Spen hubcaps. Appears to have its original floor along with the hard to find original Spen hubcaps, 16″ rims, landing leg, and a very nice tailgate. It needs some panel and frame patches or use as is. Could be restored or use as is with the patina look. Great to pull behind a Willys CJ2A, CJ3A, Wagon or other Jeep. $950 No title. Pick up in Western NC.”