Maybe I should ask this, where do i find a fog light set that fits in the stock holes and has all the wiring and harness's for 2008 prius.. so i can have them..
You could of course go to Toyota or try eBay for example: 2008 prius fog light, great deals on eBay Motors on eBay! I would think you might need the wiring harness as well, or you could just tap them into your running lights so that they would be on when your running lights are on as well as your headlights. This would be a much less expensive alternative to trying to get all of the factory wiring etc...