Most of our local hobby shops, carry many different kinds of thin hardwood, I have purchased poplar, cherry, walnut birch and a couple of others in small sheets which are about 3 feet long 6 inches long and 1/8" thick for about $4.50 a sheet, which gives you enough to make quite a few boards. I live in a small town and we have 4 shops here, so I am sure that the larger towns would have more.