My friend is selling a custom fiberglass 8" sub box for the extended cab tacoma. It is sealed and fits in the rear passenger side cubby hole. You just unbolt the plastic thats in there and bolt this box in. He is asking $130 for the box, he paid over $300 a few years ago. Located in Austin, TX... I work at Postnet so I can ship UPS/Fed Ex Express and Ground at cost, let me know.