Does anyone know of a company than makes a storage unit for the back of a f350 vs using it for passenger seats. I like to have storage drawers/filing cabinet and other storage items to have in the rear, like to items made for vans. I plan on using van products and modifying them to have storage rather than having seats. The only thing I can find are cheap plastic, shallow storage spaces that fit under the seats but I want a lot of storage for electronic tools and devices. This is 100% work truck so I only need the front two captains chairs for occupants. Any input would be appreciate from you f series pro's!