Price: $105 shipped to USA (last one)
This electrical box mount attaches to the bed rack and provides two, separately switched, 12v receptacles. All hardware rated to at least 20A.
The electrical box is weather-proof, with rubber grommets, switch and receptacle covers.
Comes pre-switched/wired, with ~6 inches of 14ga wire outside the box, ready to wire to your fused power source.
Note: requires wiring to battery/power source, not included.