IMHO,
as this is a delicate issue, i would leave it to the dealer, i mean the whole thing,
if it does not fit, they will be in charge for a solution
BTW, W&N rubbers are probably not the best quality you can get (they refabricate some of their rubbers in india, just as bmw does sometimes in china, yes, but the quality control is not the same),
and a bad point on W&N is that they do not declare what are you going to receive from them, an example, a friend bought a set of door rubbers for an e21, left side was ok, right side was a shame replica that had not the right pattern on the carrier, i am not that purist, but at least when i buy a set i want the same shape left and right hand,...,
i had bought dozens of items to W&N in the last six years, (when the web page was not that good), they are cheaper, and easier to buy, but if you ask the german guys you will learn that they buy very few items from them, and normally they do when local pickup gives you the chance of seeing the part with your own eyes
i had bought great NOS parts from them, but always when i had been able to visit them personally
again, the dealer or NOS is my reccommendation
incidentally I got a set of NOS rubbers some months ago, they were really gooood