You looking for supplemental low beams, supplemental high beams or actual fog lights?
Each one has a separate function and beam design.
Actual fog lights are a very wide beam with a very defined cutoff so very little light strays upward and reflects of the water droplets making it harder to see.
most Fog lights that come on New vehicles are just supplemental low beams with no benefit in actual foggy conditions. fashion accessories really.
https://www.amazon.com/Cibie-68716-Cesar-Square-Lamp/dp/B008DQV8D6
http://www.danielsternlighting.com/tech/lights/fog_lamps/fog_lamps.htmlhttps://www.amazon.com/dp/B00K8PE9FY/?tag=2402507-20