What a lot of great ideas.
I still have lots of old exposed Xray films I use. I also use the template plastic from Joann's.
If it is a template I want to reuse then I go to my local plastics dealer and they cut it out precisely as I give it to them. They also made my extension table tops to my machine sizes. I use my own table feet and the plastics folk drill the set in holes for the feet, again as I want it done.