I have Plexiglas (aka acrylic) cut at my local Ace Hardware all the time. I give them the measurements or a paper pattern of the template I want and they usually do it while I wait. If is relatively inexpensive. I originally did this to be sure I was cutting machine embroidered pieces straight and even. I draw an X on the template and line up the center of the X with the center of my embroidered piece. I like it for applique quilt blocks too. I am a big fan of hardware store templates. If you are especially clever and have the right tools, you could cut your own. BTW, I have them cut from 1/8 inch thick acrylic.