I didn't see it posted anywhere here but some time ago I found at A.C. Moores and Michaels, for those who don't have any near you they are craft stores, that you can by already cut plaque making wood in various sizes and shapes and they are relatively cheap. Under $5.00 each. They are great for making smaller dioramas and vignettes. They come unfinished but you can finish them yourself. I bought a bunch of them and have them sitting in the closet. Work well for what I need it for. 

Scott