Most sawmills, at least in my area of northern Pennsylvania, sell curly maple boards. I recently saw some very fancy stuff selling for $11 a board foot. For comparison purposes, your 36"X6"X1" board is 1.5 board feet, so it would cost you $16.50 from this guy. I've seen it sell for less than that as well. I have some in my barn that I'd sell someone local for those prices, but I have no real interest in shipping individual pieces. I don't think you'll have too much trouble finding it if you look at any larger sawmill.