Subwoofer Box Sub Box - '07 Chevrolet Silverado 1500 Classic crew cab

[WolfMonster]

One of the most aggravating things I'm running into is finding the right sub box that will fit under my back seat (Driver's side is what I'm looking at) on my 2007 Chevrolet Silverado 1500 Classic crew cab. I also dislike those sub cabs which claim to be bigger inside than the internal dimensions support.

For the record....
Q-Power QTW-10 or TW-10 will not fit or let the back seat come close to latching (yeah, duh.)
(Atrend) BBox 10SME, while good in height seems to conflict with the hinges and latching of the seat... unless I'm missing something.

I don't want to spend a bunch of money on this... (I don't have a shop to make my own either.) So, I need ideas... brands/models that WILL fit... and give me at least .53 (bare minimum .43) CuFt of air volume up to a max of 1.03 CuFt. I have the Rockford P3SD4-10 sub which has a displacement of .03 CuFt; 10"; shallow mount - 3.5". I do use my back seat for family.