I had WNC make up a blank for the perimeter stringer concept and shipped it to TWP to shape, paint and glass. The little one is for Judy, 4'1" the deck is texalium.
Most blank manufacturers can make you an blank to order, inluding perimeter stringers or other features. This blank set me back an extra $30 bucks and then a one time $75 extra for the machine setup when TWP shaped it.