I'm selling my (2) Arc Audio ARC12D2 (dual 2 ohm voice coil) subwoofers. They've only been used since mid November. I've got the boxes, and they're in like new condition. I suggest ~1.1CF Sealed enclosure for each, and a healthy 350+ watts. I'm NOT selling the box you've seen in my car, but Matt would help you design one for your ride. MSRP $220/ea, offered here for $125/ea.

http://www.arcaudio.com/arc-05/subwoofers/arc_12d2.htm

http://i3.photobucket.com/albums/y73...y/DSC01176.jpg
http://i3.photobucket.com/albums/y73...y/DSC01175.jpg

Let me know if you have any questions! I want them to go to a good home!