Yes, the materials are "available." But get ready for a heart attack when you see the price of CF sheet, tubes and bamboo sheet goods. Wow!
You can do the same with MDF and/or birch ply, even using aluminum rod stock and save a GRIP!
But it is very, very cool. Hey Rick, How do you get past the low QTS on the woofers? Every OB design I've ever done needs a QTS of at least .45 to work with any relevance whatsoever. But good grief, those are pretty woofers, aren't they.