X-pedX is a paper company here in SLC UT and I've bought vallum there. Would think you could get it at any office supply. But old telephone books, magazines, recycle stuff can do just as well. The only thing about vellum you can see through it if you're doing paper piecing. Some people use sandwich wrap from Sams Club or the other store. When paper piecing came out I got excited; thought I'd do well, but some days I cut what should stay and leave the rest. Good luck!