I designed this LED fog light housing for my Land Rover Discovery which can be adapted for other 4x4 and offroad vehicles. It prints in two parts and is glued together. The base of the housing has an alignment lip which fits into the flange piece of the housing. The housing is mounted to a bumper with 4x M8 hex head bolts. The right hand version is shown here. The left hand version can be mirrored in you slicer.

The LED light used is a commonly available design with varying model numbers depending on manufacturer.