I've got (in my hand) a bit of paper from my BMW dealer in The Hague that has (according to him) all the parts required for an install of all 3 bits of plastic.
It's got 25 items on it.
The 3 big ticket items are the screen, the support bar, and another 175 (or 134) euro part.
I'm pretty sure that the third item is the internal support for the winglets... These bits of plastic are made from polycarbonate... if you lay your bike over, they won't break... if you just penny-washer them to the front body piece, you will rip the winglet out... costing yourself one expensive??? body piece.
My BMW dealer seemed to think that it was the instrument cluster/headlight mount (which would have been great because mine's dinged up from my Norway roll-over.)... however I priced that piece at about 500 euros...
So oil cooler mount (there is only one expensive piece, not two sides) sounds about right...
FYI all 25 bits come to a grand total of 694 euros... (INCL tax) That would give me all 3 bits of ADV windscreen mounted... "properly"....
Al...