The crank case oil seal, according to the dealership, has apparently been slightly re-designed by VW multiple times and there are a number of part numbers since the original iteration. They are well aware of the failure rate and usually have the parts in stock. If you are prepared to have a bit of a fight with VW Customer Care you may stand a chance of some "good will" especially if you have full VW SH. My experience of good will is that they are going to do it at a lower rate, still with profit and not quite at cost, probably nearer a normal trade rate.
as other have said worth doing belts and water pump at the same time (consequential works). My T6 2019 failed at a similar mileage. I think I got 40% good will but they gave me this off the whole job inc belts etc so when I priced up with a local indy it was roughly the same. Interestingly the indy did suggest that the seals they fit are OEM but have a sticker placed over the VW logo on the box. A decent Indy will likely fit quality parts, no brainer not to
If you can get goodwill contribution then maybe worth getting it sorted at dealership and you get two years warranty as falls outside the all in warranty cover. I found out recently that any warranty replacements are only covered for the length of the said warranty
I seem to recall I paid just shy of £900 but that was two years ago
