Another place to get the 12.5 ruler, pretty much always about half price or less is Wawak.com (no affil).
Personally, I think I'm going to check out my local hardware store and see how much it would cost to cut some plexiglass and how accurate they are, because I like the idea of having many sizes without the ridiculous and silly sewer's price markup.
Last edited by TeresaA; 04-01-2014 at 11:15 AM.