This is the fan bearing as it comes from Audi:
The hub can be pressed out, but the bearing housing and flange are one single piece:
This is £13, ebay listing
here
Its listed as Audi 100 & VW LT, but the part number is in the description which is how I found it. With this one the flange and bearing are separate so the bearing can be changed.The holes are a bit off-centre, but they're close enough for it to bolt in to the bracket. No idea how long the cheap Chinesium bearing would last, but I guess for low-mileage D2s it may well be acceptable for 1/20th of the price of a genuine one!
I may well buy a few and a few SKF bearings to go with them, then I have good ones ready to go if needed
