I don't know if anyone has mentioned this but I make my own templates out of plexiglass. I use a sharp scribe to trace around the pattern piece onto the plexi and then I have a band saw that I cut out the pattern that I have scribed on the plexi. The template never wears out but then I have lots of scrapes of plexi. the thinner pieces are easier to use. I have heard that you can scribe on plexi and then break it like glass but that has never worked for me.
Lynda