When I bought my 02 explorer eddie baeur they said the 4 wheel button was bad and I cant find out where to get 1

I'd check on line first. My experience with dealerships is when a vehicle reaches ten years old thel seldom stock parts unless the part covers newer vehicles, although they can be ordered. I have also learned parts from dealerships are three or four times more expensive. Also. Dealerships do not stock a wide variety of parts, expecially parts which do not have high callings. When I purchased my new F-150 I wanted a standard rim matching the four on the ground for the spare. It had to be ordered. Only took a day or so to get it in, but I had to return to the dealership to mount and balance the tire.