A couple ideas.
1. For pictures of interiors, undercarriages, and engine compartments of clapped out cars, go to eBay Motors. Check out cars of the 40s-60s. Pick ones that are pretty beat up on the outside, and checkj those ads with a lot of pictures.
2. I was fixing some heating ducts recently and used this stuff called variously aluminum tape, heater tape, etc. It is NOT duct tape. It seems pretty pliable, and might be useful for something.