ok i had a box built for my integra, its fiberglass/wood molded to fit the spare tire well. its roughly 1.1-1.2cu ft. needs to be painted/carpeted and a little trimming maybe required to fit perfect but it fits snug and looks good.

i also have a Treo TSX 12" sub 400W RMS dual 4ohm very little use, had this setup and well my mids/highs overpower the sub so im going with something a little more powerful. still in car and can be preveiwed before sale.

$70 for the box
or $150 for box and the sub
or the sub alone for $100

if interested lmk. 863-812-5167

can provide pix through text only.