anyone using a 12 inch Sub box

[Hellz]

so looking to add a sub box under the back seat.

i have both a 10 inch kicker sub and a nice 12 pioneer shallow mount sub.

i know i can get a box for the 10... i wouldnt waste anyones time with that.

what i am finding is that there are no 12 in sub boxes out there...

well not that i can find.
i have seen the JBL stealth boxs, but honestly at $800, i would laugh at anyone who paid that...

anyways... who is running a 12 inch sub box under teh back seats?