I bought mine from the local quilt store.

There are a couple tutorials on making it without the rulers here on the board. You make your own templet.

Here is just one of them...

http://www.quiltingboard.com/t-57130-1.htm

Primitive Gatherings at www.primitivegatherings.us.
This place was given permisson to make the two smaller rulers from the Schoolhouse place.

The book I have had templates that I copied onto template plastic and cut out. The templates have held up real well.