I installed the backup camera that replaced one of the plate lights into my car last week but was unhappy with the angle that the camera sat and the narrow focus of the field of view from the 120* camera. I ended up finding another camera that is combined with the trunk release button and it looks like factory installed. I did have to remove some of the plastic from the trunk handle release button area of the rear hatch, but afterwards, it fit perfectly. Even better it offers a 170* field of view. You WILL have to remove a millimeter or two of material to fit the camera into the fixture, but for me it was worth it.
This is the camera I installed.
https://www.amazon.com/gp/product/B073XQ3QKQ/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
This is what the finished install looks.