From what I can tell, 2 options:
One is a back up camera accessory that has a rear view mirror with a built in LCD display which you can add on (it includes home link) ~$750.
http://www.nissanusa.com/zcoupe/indi...-options.html# (Scroll down)
The other is the Nav package which uses the Nav screen as the rear view display instead, and you retain the regular rear view mirror.