Dee Zee Tech Tips: Installing Padlocks on the Padlock Tool Box - YouTube
Amazon.com: Royitay Truck Tool Box Lock Replacement 16MM (5/8") with Keys for Toolbox Latch Cylinder Cabinet Pickup Truck Tool Box Control Box : Automotive
Amazon.com: Truck Tool Box Locks, 2-Pack 5/8" Cylinder Key Alike Cam Lock Replacement Kit for Mounting in Trucks, Trailer, Rv Boxes, Mailboxes or Cabinets and Drawers, Fits on 0.39" (10mm) Max Door
Dee Zee Tool Box Replacement Locking Latch, Horizontal at Tractor Supply Co.