I've got a '51 FC (gutted right now) and a '53 FC w/many original interior "elements" still remaining (but in tough shape). I don't feel like mine are/were worth restoring to original, so I'm rebuilding to my liking/needs. Not sure what your question is, but I'm sure there are others w/similar trailers that have leaned more towards "restoration".
Aluminumbskull with Led Balloon in Drag
Birch Plywood and Aluminum go together like
Peanut Butter and Chocolate