It's a Toyota camera. It looks identical to the camera installed on the 2016 car.
I got it off ebay searched for Toyota Fit camera. Paid about 100$ for it. Comes with the hole saw to drill the hole to mount the camera. In hindsight I could have gotten a 15$ knock off and accomplished the exact same thing but like yourself I wanted a factory part.
It comes with a harness that plugs into the back of the radio. You have to tap into your reverse lamp signal and run a wire for the reverse trigger. There's a thread on here how to do it. Now that ive done it once it's a half hour job at most.
No way would I spend 1500$ upgrading to a 2016 headunit to do the exact same thing. That would be ridiculous.
Here is an install thread:
http://www.ft86club.com/forums/showthread.php?t=65777