I am a sucker for templates so this may or may not help you.
http://www.deepbluetemplates.com/ I have been using this company, local here in Washington State, for a long time. Besides the templates they do sell they will custom make any template or size of ruler. They just need a description or picture of what you want and prices are so reasonable. They all come with 1/4 inch seam allowance but on a few of my squares I did not want that and he made them just "my" dimensions.