I may have missed it, what is the wood the box is made from? One source
I've found for everything from plain-jane to knock-your-socks-off is wooden
flooring. You can get narrow and wide widths, thin and thick. The only
thing that makes working with it tricky sometimes is that a lot of it is
laminated wood or plywood. Of course, you can use this as a "feature"
rather than an "bug".