Here are three I am considering:
and
and
All are available as a 7" round replacement; just no pics. I know I have seen the fluted before, and I know I have seen many different patterns for the fluted. I couldn't find a pic for this post, though.
The "halo" unit above, a JCWhitney unit which has a city light and fog light, and a unit I saw on eBay with an H4 and a city light make me wonder how they are plug-n-play. I mean, how does the wiring have to be handled to activate the light(s) desired?