I once made a solid plastic template out of a type of plastic that comes as little beads that melt in boiling water. Once melted you can squidge it into a ball and then stretch over your head. Looking at Hersute's video I know it is exactly the same plastic as in that video. It costs a few dollars for a bag of it. I made the same kind of template as in that video. It was rock hard. But I never sent it in with an order because I wasn't sure if they could use a hard template like that or not.