New here posting just for this thread.

I have a 2002 Focus LX without the fog option. Just installed fogs from a breakers, including the 2 stage switch and surround for £20.

The fog light plugs were taped up, one above the horn and the other next to a pipe above the fog light location. The lights require two washers, a bolt and nylon nut to secure per light (I used a cable tie, does the job).

Quick and easy to do with nothing else required. The front fogs can be used with side lights or dipped beam, with the option of switching the rear on.