you don't have to buy the template. either have the plexiglass cut (it's hard to cut the inside hole) or use a picture frame. as long as it's the size and shape you like. it could be a rectangle.
Would copyright apply to templates? Is making your own an infrigment on someone's else's ideal? or does it just apply to patterns? I'm all for saving money but are we stealing someone's else's ideal when we do this? I'm not out to cause trouble just curious, that's all.