[dsraven]

if you have some sheet metal skills there is a nice little led light from a chevy cavalier that would fit into the spoiler of the car but you could fab up a bracket for it easy enough or fit it into the rear of the cab sheet metal.it is pretty flush mounted but does have a bump on the back side.
if no work is more what you are after, check out what would be available for a jeep. check the andy's auto sport site part number LED3B1, it comes in a billet housing and the base is adjustable by the look of it. you could screw it to the area below the back window possibly. is this a small window cab or a big window cab? this one would look better in a big window cab prolly. you can just wire it directly to the brake light switch before the wiring gets to the turn signal switch, that way it is only brakes and won't blink with the signals.