Audi 100 Coupé S brake booster

[Jaco Mostert]

Hi,

I'm looking for a replacement brake booster for my Coupé S. Apparently it has the same brake booster as a 1100 Mk1 golf, which is 9 inch in diameter. According to the sales assistant at the parts store where I usually get all my parts this brake booster is no longer manufactured and i can only get the newer 10 inch brake booster. I'll have to modify the pipelines and get a new master cylinder to use the 10 inch brake booster.

Will I have to do this or is there another brake booster that fits my car without a lot of modifications?