Try Porters Camera in Iowa, they stock reasonably priced pre-cut mats that you seek. You may find that buying in bulk from is cheaper. One thing to keep in mind, no matter who you buy from, there is an extra shipping fee for size. You can do what I do, find a local frame shop and have them cut the mats for you. I'm good friends with the local framer here, she's happy to have the income, and cuts exactly what I want for the same price as pre-cuts.