That's going to be a tight fit, my friend. :) If you want to go with dual tens, they may have a single box for both or separate boxes for each corner. Then you can mount the amp in the middle. Building a box is not that hard if you have the right tools. (Table saw beats Jigsaw anyday...) Also, you have to plan it out a little to get it to match the sub.
(My $0.02) One good ten should be all you need in a single cab. (My 10" solobaric ROCKED my entire cherokee and was almost overkill....) If I had another single cab, I'd buy a good solid ten for the rear, then save the rest of the money for a good set of separates for the front and a solid 4ch amp to push it all. Simplicity in design.
Good luck with what ever you decide to do and keep us posted.
I live in my own little world, but it's ok.....
they know me here.
-2000 XLT Super Cab 4D 4.0 OHV 5-speed
Hidden Sub 'Mod'
-1959 VW Karmann Ghia Convertible 1776cc Dual 40 IDFs
1996 Suzuki Katana GSXF 600cc Gas Mizer