Octavia III - original rear bumper DTM diffusor OCTAVIA CUP : superskoda.com der müsste es sein oder?

Unter „Cup Wing“ versteht man aber glaube ich Spoiler und nicht Diffusor.

Da hast wohl recht, den Titel hatte ich net beachtet

On Google images there's a picture of the same car with a Superskoda.com watermark. Maybe write an email to them? They may still have it or at least they may know where to get it.

Køídlo CUP karbon koda Octavia III - Spoilercentrum - online tuning shop
Found it there but only with Google translate and I'm not sure if they're shipping to outside of Czech republic