I called pretty much every DD dealer in Dallas and one in Arlington.
If you need a box this is the guy to go to (he has built and restored over 200 cars in his life, no one can touch him in terms of raw craftsmanship and knowledge)
https://www.facebook.com/thumpinsounddesigns/timeline?ref=page_internal He's a dealer for Sundown/American Bass (those are the one's he sells directly) and he'll build a box for any brand
Earmark Plano is the best shop in terms of talented installers but the items they sell are way overpriced (they only deal in highend SQ). It's a good place to get a proper tune for a setup that's already been installed