Go to www.car-part.com. Plug in all your info and what state you want to look in. This will bring up all the salvage yards in your area who participate in that network.
You want wiring and options, but most of the time the salvage yards do not list the little items on the website. If you come up short, just plug in something common like a fender or steering column, seat, etc. Then you will at least know that they do have some trucks in the yard like you are looking for.