Here are the websites for that one.
https://carbonplast.eu/galeria/carbon
https://www.facebook.com/carbonplast.eu/
I doubt many are doing the quad conversion without an M bumper. I am looking to do quad with the original bumper but with one of these style duffusers. I have the wing from you and happy with the product. I guess with what you are planning to do it probably wouldn't work for myself with a quad exhaust and a non M bumper. Are the lines on the bumper that different, or is it just the middle portion that is?
The attached pic is similar to the V1 but on a non M bumper.