Billy Box. Handmade to order in Austin, Texas, these aluminum truck bed toolboxes are custom-built to suit your specific needs. Choose a color, select organization components like dividers & compartments, then the add-ons like LED lighting, speakers, a V-Grip rack system for holding guns or tools, and more.
Camplite 6.8 Ultra Lightweight Aluminum Truck Camper. Fits on a standard pickup bed with no overhang. Says it's designed for half-ton trucks, but with a dry weight of 1700+ lbs it will exceed most payload capacities. They have a smaller version for mid-sized trucks.
The ultimate utility truck accessory - sturdy, rustproof aluminum rack clamps securely onto your truck bed rails and has mounts for a crossover-style toolbox. Slotted crossbars let you easily adjust the included load stops. Over-the-cab extension lets you carry pipes, lumber, and more.