Tuffy full length rear drawer. This is the short version that would allow you to mount the seat above it, or use by itself.
More details on the Tuffy website: http://www.tuffyproducts.com/p-181-f...at-drawer.aspx
Retails for $470, paid closer to $550 to get it shipped to HI. Like new condition. Asking $300 delivered to Denver. You'd have to grab it in Denver or RURR it.