You could put a post in the parts here  https://www.scampowners.com/forums/member-trailer-parts-salewanted for an icebox wanted, but if it were me I'd look for other options. I did see one at Dyers but it was almost $200 and I'd rather mod in some type of modern cooler into the space or a 2 way fridge. Lots of options and ways you could go that would be better if you can't find someone that has an old one sitting in the garage.