I have a BRAND NEW IN THE BOX Kicker Comp VR 10" DVC Subwoofer that I NEED to sell in order to get an amp to run my system. Here's a product link. I'm only asking $100 (that includes shipping)
Kicker Comp VR 10" DVC Subwoofer
This sub is the Dual 4-ohm model, so you can run it off a smaller amp and just wire it in parallel.