Got my genuine VW wind deflectors from the Dealers on the day I picked up my Ocean last month.....cost less than £38. Ok, still to peel off the sticky tape (no screws needed) as it's been too wet or windy to fit them yet but I can't see that they'll pose a problem, and being externally fitted they'll not be a problem for acoustic door glass.
For what it's worth, I've also, today, purchased a genuine VW rear bumper top protector for under £66, so that's another warm, dry still day's project (more sticky tape).