My 1987 Audi 100CD Avant has a rear self-leveling shock absorber that is developing a leak and I need to replace it.
The Audi part number is: 447616031
The car chassis number is WAUZZZ44ZHA005801
The engine is a KU prefix.

I would appreciate information of the equivalent shock absorber part numbers of other manufacturers' products (Munroe, Koni etc) so that I can source a replacement or details of where I can find a replacement.