Heavy Duty Aluminum Toolboxes for Pickup Truck: High side truck tool box, Low side box, Low profile tool boxes, Saddle truck tool box, and 5th Wheel tool boxes, we make it all.
24" x17"x18" Truck Under Bed Tool Box Underbody Storage Pickup Trailer+Lock | eBay
Kobalt 64.1-in x 13.5-in x 16.1-in Aluminum Top Mount Truck Tool Box in the Truck Tool Boxes department at Lowes.com
Tractor Supply Low Profile Full Size Single Lid Truck Box, 8766TSCL at Tractor Supply Co.
Lund 16.5 in Diamond Plate Aluminum Full Size Chest Truck Tool Box, Silver 5116 - The Home Depot