Mini Twisted Pinwheel
Is this the type of pinwheel you're talking about? I've made one full sized throw quilt and several table toppers and along came the mini - of course I had to buy the template and try making one; this is all the further I've gotten with it so far. I pinned it to a hanging rack the backing is there; I just need to decide how I want to quilt it.
I initially took a class to learn how to make these and the one thing the instructor emphasized is that you lay them out (keep them together) as your cutting them out otherwise you will have a huge puzzle to try an put back together.
I wish there was a simpler solution to your dilemma but there really isn't.
Good luck.