I designed this for my 2015 Jeep Wrangler Sahara Unlimited. I know they will fit other models and years, but I don't know which.

I took the basic size from Summer Ride's Flasher Grille. I replaced the grille with the Imperial cog symbol and played with the flanges a bit. It is open enough that you can still see most of the light from the blinker (see picture).

The fog light grill needed tweaking with the size. I also rotated the flanges 180 degrees. Now they fit perfectly. I tried black and thought it would look great with the white Jeep body. However, as can be seen in the pictures, the black didn't stand out like I thought. The white does show better, but that's my opinion. Also, my foglight have halo lights. The halos show perfectly just inside the outside ring of the grille. It looks great actually (picture).

The differences between the blinker and fog light files are:

1. The fog light file has a slightly smaller diameter, like 1.5 mm or so.
2. The easiest way to tell them apart is the fog light flanges have the lip facing out, while the blinker grille has the flange lip facing in.

Printing:
I printed them as is in the files. The only parts touching the build plate are the ends of the flanges, so you'll want to use a raft or brim. I just used a brim and it was perfect. I attached the Cura setting I used for support. Basically, 10% density with 1 support wall line and 60 degree overhang. I also enabled support interface for the roof.