I've not seen the official ones up close but I don't see anything wrong with these ones. Still not entirely sure as to the point of the openness but I like it
....The story goes that once-upon-a-time
Little Red Riding Hood Volkswagen supplied open grilles on DSG Mk5 GTI's destined for hotter climate countries. The intention was to increase DSG oil cooling. However, they found (apparently) that the oil didn't need further cooling and that the grills were ineffective anyway.
Subsequently, modding folks decided they looked cool and some thought they would route colder air to somewhere useful. But others thought this was internet bullsh!t. VW are obliged to supply them as original equipment replacements and they have wildly (The Big Bad Wolf's influence) fluctuated in price. Inevitably, the real villains have made very poor quality copies and some of those are sold on fleeBay but there are some genuine ones there too.... Apparently.