The build I'm doing for my Topkick may present an opportunity for this. My brother's company is doing the boxes for both the camper and the trailer, and if it goes well, he might be interested in doing more of them if he can make it worth his while. While he's a specialist in very large casting and fiberglass projects, my build uses plastic (you read right) honeycomb panels. Volume really helps bring the cost down for the material, and our build/assembly process might require far less time and labor than existing approaches. And the boxes should be fairly indestructible. We'll know in about 4 weeks!