I found that the place I order woodworking tools from has plywood! What makes this better than the sources that I've used previously for baltic birch ply? First: It's pieces of 60 inch long by 12" wide ply. That makes a lot of ships that can have a one-piece subdeck if you're so inclined. Anything up to 720 feet (in 1/144). Second, it's $10 for the 1/8" thick ply, and $11 for the 1/4" thick. It's made for people making cabinets, so it's reasonably nice plywood; some color-matched plugs in the surface here and there, but I'm happy with the wood I just got. Rockler Woodworking's baltic birch plywood page: http://www.rockler.com/product.cfm?page=846&rrt=1 If you put your email address in to get notifications, they routinely have 15% off sales going on, making the wood even easier on the wallet.