Check Kaye Wood, Eleanor Burns and Shar Jorgensen websites. I know Shar Jorgensen used to sell the thick templates to make the pieces of the arcs, plus a template for an arc using just one fabric, which I think would be easier. I did a wall hanging years ago when I was first learning to quilt and I used the one fabric in the arc. I remember buying a set of the plastic templates, that also came with the instructions - however, when we moved, they had disappeared, probably when my son and husband were cleaning my sewing room in the basement. I got upset, but it didn't really do any good, as now I don't have the money to spend on the templates. Good luck with our double wedding ring quilt, would love to see what you do.