I LOVE blocloc rulers, however, I find their website to be very frustrating. I just ordered a template from them yesterday (belated bd gift from me to me), so I sort of remember how to navigate.
Book here:
http://shop.blocloc.com/The-Bloomin-...de-CQ-B-BC.htm
tool here:
http://shop.blocloc.com/Bloomin-cogwheel-Ruler_c17.htm