Cab Enclosure Hardtop for Flattie Sparta, NJ $500

Might be worth a look.

https://newjersey.craigslist.org/pts/d/sparta-jeep-mil-spec-winter-top/7402631469.html

"Off a 1951 M 38 Military Jeep. Will fit others. All Aluminum except front windshield frame. It had a canvas rear window panel, long gone."