Hi, I have a 2005 Dodge Ram 1500 Quad Cab, and I'm looking to fit either a couple 10" or 12" subs under the rear seat. I don't really want to spend the money buying a prefab or custom box, so I'm building my own. Does anybody have plans or drawings of boxes they've seen or built that would fit and have between .5 and 1 cubic feet of volume? Preferably that fit into the storage hole where the jack is.