This is a great weekend project. It's quick and uses very little fabric. I've sold many of these in the past but have kept about four of them to myself. One can't never have too many coin purses!
The PDF tutorial can be found at my shop. It comes with two templates. The ones shown here are the smaller version. I find that upholstery weight fabric gives a nice body to the purse. If you are using a quilting weight fabric, you can use fusible web to add stiffness.
If you are in Canada, you can buy the frames online at "the workroom". Or you can try Etsy and search for purse frames. Look for 3" or 4" wide frames.