The simpilest solution for this is Rumion tail lights. They have the back up light in the regular housing. They are factory so they fit perfectly. Only thing you have to do is run the power wire for the back up light in the bumper to the ones in the tail lights.
Here is a link for ease of finding.
http://www.newscionparts.com/product/?id=2759
Here is a link for ease of finding.
http://www.newscionparts.com/product/?id=2759