They certainly don't make it easy to find! You can get it at Primitive Gatherings. even though they are the ones that created the twister tool, the mini's are listed under kits, then 'pinwheels'. I think I looked for an hour when I bought mine. Here are the links, you need to select "pattern" which includes the template.
this is the one that uses 2.5" squares:
http://www.primitivegatherings.us/sh...productId=8740
Here's the one that uses the 3.5" squares:
http://www.primitivegatherings.us/sh...productId=7103