I would agree that the FPN "fog light kit" will likely come with everything you need to install the lights (lights, wiring, brackets, etc.) I would email them back and be more specific saying that you need only the bracket that the lights mount to, not the lights and other crap, then the price will likely drop significantly.
The PIAAs won't come with the factory style bracket you need to mount them to. They will probably be a simple stud and nut type mount that you will have to drill a hole, or use an existing hole, in the factory bracket. But the PIAA lights will be much better than the stock ones for the money. The stock ones are as, if not more, expensive than the PIAAs.