Here's the one I bought off of TXH3T
The bed rack was custom built by 2 members of Expedition Portal in Prescott, AZ. It was originally made for a Sierra Expeditions Tacoma 5' short-bed (for the 2004 and older models), and is 62" long by 60" wide but just happened to fit the bed of the T perfectly with just some very minor modifications to the bed mounts themselves that were fabbed by its previous owner, TXH3T.
The rack bolts into the T's bed rail system/bed by way of 4 bolts, which go into 3/8" unistrut/superstrut spring nuts that I bought at Home Depot - they fit pefectly within the T's bed rail system (no drilling required).
The rack has a bed-bar mount (where you see the shovel mounted) that also has 2 threaded bolts/studs to mount a Hi-Lift jack. The bed-bar mount was fabricated by Fabwerx and also has 2 custom-made aluminum tube C clamp mounts adapted for the Quick-Fist straps to hold the shovel.
The bed rack is notched out to accommodate the weld points of the bed-bar to the bed rack's flat rails which sit on top of the T's bed caps. The bed rack is spaced rear of the cab with enough room to accommodate 2 jerry cans snug so that they don't move at all (or other equipment).
