Rear center seat belt replacement and back up light wiring questions

[Biggredd]

Have a couple random questions. My rear center seat belt receiver end is cracked and the metal tab of the seat belt won't click in. Is that a replaceable part?

I have an indash dvd player and am about to hook up a rear view camera. I want it to display onto the monitor when I put the truck in reverse. There is a wire included to make it do that. Is there a place in the cab or in the wire cluster that runs along the driver door that has the wiring for the rear back up lights to tap into? If so, what is the color and where would be the easiest place to do it near the dash?

thanks

2008 F250 crew cab