Since the question of where to buy 1/8" birch keeps coming up, I thought it might be good idea to have a thread dedicated to telling members where (exactly) to find this elusive wood. Some sources are sprinkled in other threads on other topics. Let's make a centralized list of suppliers easy to find.
Name of company Address-or at least the town Cost When you last bought from them
Springdale, Arkansas I purchased June 2015 22$/ 4x8sheet. Their inventory is low and they haven't reordered. I suggest those in the Midwest call to inquire to their main location. Perhaps they will get more on order for those of us in the Midwest. They did transfer what I needed between store so I could pick up at the one closest to me.
There are other Windsor Plywood locations, as well. I was able to order the 1/4" ash plywood that I needed for my Aladdin from them. I looked through all of their instock ply, and they have birch in several thicknesses, including 1/8", and price was in the $20ish dollar range. They also have door skins (1/8") in different woods. I wanna say that there was birch, oak, and walnut, and maybe some others. I was last in there about 2 months ago.