As requested gents...
Go to Home Depot in the lumber section. On one of the end of hte aisles, they have metal strapping that has predrilled holes in it. It is available in 4 "-24" lengths. No more than around $2.00 each. Buy some shallow flat head bolts and nuts in the hardware section. That's it, all the parts for around $5.00
Take a spare license plate or the one off your vehicle, lay it on the strip, trace the 2 holes at the top of the plate onto the metal strip using a black marker. Place the leds on the side of the plate, draw a line from top to bottom just at the edge of the led to hide the metal, but allow the screw to tap into the metal on the led.
Drill the appropriate holes for the screws and 1 hole in the center behind the led to allow the wire to pass.
Route the wire to the center of the plate and zip tie them to the metal strap, which will be all hidden behind the plate.
Route the wire down to the 2 lower screw holes on the plate. You will only mount the plate using the top screw holes, the lowers will not be used. They will be used to allow the wire to pass into your vehicle, if an suv. This is a no hole, cheap way to mount your leds to the rear of your vehicle.
This is what I used on a few vehicles so far with no problems at all...very low profile and professional looking...
http://www.homedepot.com/h_d1/N-5yc1vZ1 ... ogId=10053