I think these are from Mosshammer in Germany. Mosshammer are TUV certified, so fully road legal kits.
automotive.moshammer.com
They seem to have been painted gloss black on the green car in your pic.
Mosshammer do sales very often so it’s worth waiting for.

Moshammer Front Spoiler Evo 2 Pro For Mini John Cooper Works JCW LCI 2
Moshammer Mini JCW LCI 2 Front Spoiler with perfect aerodynamics and a breathtaking design is delivered unpainted. Fits all Mini JCW LCI 2 models.

Mosshammer do sales very often so it’s worth waiting for.