If you have a local lumber store (not home depot), they would either have it or can order it for you. The internet is a great source as well.

www.rockler.com is where I get a lot of my stuff.

If this is your first time trying to laminate something, then you might be better off using a cabinet grade plywood and skipping the laminate all together. These have a nice layer on top that you can stain and comes in a lot of species (birch, cherry, oak, etc.).

PM me and I can help you plan one out.

spiffy