Yep, you need to make a harness to run into each door for the power fold wires and the turn signal wires, and for the puddle lamps if your truck doesn't already have them. For the mirrors themselves, I cut mirror pigtails from 99-02 mirrors and soldered them onto the 03+ power fold mirrors so the mirror movement functions, and the heated mirror function was all plug and play after that. Although on Wesley's truck, he did not have heated mirrors originally, so he doesn't have the rear defrost/ heated mirror button on his AC panel. But the wiring was in his doors, so I wired up the mirrors for it. Theoretically, all he would have to do is get an AC panel with a rear defrost button and his heated mirrors would work. Mine had heated mirrors stock, so mine work fine with my 03+ power fold mirrors.
Oh, and back on the subject of looking for mirrors.....I have a drivers side power folding turn signal mirror with puddle lamp, and it has a white mirror cap. Make me a reasonable offer and I might accept.