Hi Gary, I've been trying to find a spot for a 2 meter antenna for several years now and can't seem to come up with anything.
I have seen license plate brackets that mount behind the plate and provide a tab that sticks out over the plate that you can mount an antenna to. Something like this http://www.pro-fit-intl.com/lpant.html
I've also seen a 90 degree angle bracket attached to the hatch area. When the hatch/trunk is open, look at the lip on the side. The bracket was screwed into the side of the lip, then sticks up, and out over the rear fender.
Neither of these to options appealed to me, so I remain without a radio in my Coupe.
Best of luck to you.