I ended up with these on Ron Burgundy:
http://ecomodder.com/forum/showthrea...tml#post476929
I'm coupling them with a panoramic rear view mirror, which turned out to be awesome. Since the mirrors are like the least aerodynamic part of the Insight, I ended up modding this first.
The OEM mirrors are the equivalent of shoving two catcher's mitts out into the air stream. These, not so much!