Not sure if you've seen this thread - this car is stunning, looks OEM.
Not 100% but I think he may have had to modify OEM M3 Coupe gaurds.
Also, Cliq Tuning have some, no idea on quality - imagine any third party solution will require a bit of fiddling though.
https://cliqtuning.com/shop/bmw-e46-sedan-front-overfenders-m3-style/?c=72e1ba2726d6