I wonder if the spring material used with weather stripping on aluminum screen doors is similar?
Thanks everyone for the tips and pointers.
I worked on the holder for a couple hours today and I think it will eventually work. This project has been challenging. If I were to start again, I think I would design the holder first, build it, and then start designing the rest of the camera around the holder. I think it will turn out to be the most difficult and critical part to make.