Exact Dimensions of Rear Seat Storage on 3rd Gen

I am looking to build a custom subwoofer box for my 2017 Tacoma. I need to know the exact dimensions of the rear storage compartment behind the seats in a double cab without the plastic cubby inserts. Is there anywhere I could find this? Does Toyota have this information somewhere? Already have the subs just need to create a box that will perfectly fit behind the rear seats.

 

There are a lot of bolts and misc things on the floor and especially back wall, it’s hard to say exactly. I just tore it out, started at the bottom and back and worked my way up. Taking the back of the seats off makes things easier to maneuver

 

btw have you seen this? Good place to start: https://www.tacomaworld.com/threads...dio-install-build.402547/page-4#post-11997915

 

Woah that looks like just what I'm looking for! I'll definitely look into that, Thanks!