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Fiddler tried this and ultimately succeeded, though it was a bit of a nightmare.
Personally, I'd buy and fit the proper lamps, but just wire them as you would a normal set of after-fit fog lamps, rather than trying to use the existing wiring.
If you want the factory look inside too, then you'll need to buy the proper stalk and meter out the fog-light output pin on it. Personally, I'd just fit an extra switch and warning light in the dash somewhere. This will be cheaper and much more straightforward, and will have the added bonus of allowing you to use the rear fogs without the front (the proper switch won't let you do that.)
Currently in Horatio's garage:
2010 Laguna III Initiale.