If there is a Michaels (craft store) near you when you visit the US they will take anyone's coupons. Google ACMoore crafts, and print out their coupon (or 2 and take someone with you to use the second one) and go to Michaels and get your rulers at 40% off.
I have recently replaced a few cutting mats with JoAnn coupons at Michaels. They are closer and easier to get to, AND very pleasant.