Looking for backup camera for factory ford system

I want to leave the factory camera in the tailgate as I only use the camper 10% of the time. I have been searching and found a little information but after 2011 they changed the plug and then in 2013 guys were having trouble making it work at all. Mines a 2015 so all bets are off but I guess I will start at the dealer for a tailgate harness and go from there.