Update:
two piece rear lights, mounted to the chassis rails with two screws from the inside.
The square ones are the Tamiya Kit Lenses, the round ones are to suit the LED holders from "True Scale" in either 3mm or 5mm holder size (5mm shown)
All Bumpers are 180mm wide (including chassis for the two piece) 20mm high and 8mm thick. all can be done with or without mudflap holder.
One piece version mounts to original bumper but with hidden screws, this one is also available in round or square, and all can be 2,3,4 or 5 lights, if I can fit them in I can make as many as you want.
(prop not included

)