Do you have a favorite TNT pattern that's falling apart because you use it all the time? You might want to consider making your own clear acrylic pattern template. It's fast, easy, and relatively inexpensive to create these handy and virtually indestructable pattern templates.
To create the template for my favorite TNT (Christine Jonson's BaseWearTwo tee shirt pattern) I started with ten 12" by 18" Dritz acyrlic sheets that I found in the quilting section at my local Hancocks. To save money, buy them when your sewing store has a 50% off sale. Note that there are two types of templates -- one is made of slightly thicker acrylic. I used the one made of thinner acrylic
I store my pattern pieces in an inexpensive paper portfolio I found at my local Micheals.
If you create Frankenpatterns, it's great to have your TNT on a clear material because you can place the template over your new pattern and adjust until the patterns are aligned in the proper position.