I got the door trim at O'Riellys. They were like $3 a package, I needed two packages to do what I did, but your mileage may vary depending on what you decide to do. I did from the chrome down on the vertical of the front doors, the apex of the turn to the bottom of the rear doors and the horizonal of the lift gate from the corner by the tail lights to the corner by the tail lights. If you want to do more you might need a couple more packages. It's easy to install, on a warmish day just press it in place.
Good luck.