Double cab subwoofer box

[Nick Varner]

I recently bought a 2015 GMC Sierra double cab non bose sound system. I want to put new mids and highs in the doors and pillars. That set aside I’ve been looking for a subwoofer box for under my backseat. It’s a double cab so all I’ve seen so far is slim pickings. Especially when I have two JL Audio 12TW1-2 subs I’m trying to place in the box. Yes they are “shallow mount” subwoofers but they have a meaty cage surrounding the coil and magnet; so not every box can fit these. I’m probably gonna have to put my back seat on fabricated lifts but as far as the box goes any suggestions?