Buy your own lumbar, some nails, and maybe some adhesive. Other than that, all you need is a saw and a hammer. Even a handsaw would work.
I guess you could even sand down the pieces or at least the corners.
You want one piece to be longer than the others to serve as a handle. Making the handle shape isn't entirely necessary.
Other than that, some phone books might work. You'll need to strap them down to keep them in place.