I mentioned this on another thread so I figured I oughtta post up some details.
I used the bracket from
Off-Road-Only to mount the plate to the spare tire.
I used Lite N Boltz (bolts with LEDs in them) to light the plate. Probably not legal in CA.
Tapped into the existing plate wiring, ran it up behind the taillight, into the tailgate and out the vent. I added a quick disconnect so everything can be easily removed to get the spare off.