I made my own to do the "tumbling block" quilt. You can use the 60 degree angle on your ruler and a piece of paper. That way you can make it any size you need.
If you need some additional help, pm me. I might be able to make one and email it to you. If need be, I can draw them and snail mail them for you. Would just need the size (how long you want a side to be).