I am looking to replace all four shock absorbers and springs (including top mounts) soon due to mine being a bit tired. It's a 2002 Tdi Quattro. I have found this chap on ebay selling a front pair:

2 GAS SHOCK ABSORBER FRONT AUDI A3 8L1 FROM YEAR 96 NEW | eBay

Seems like a good price. Any one on here had any experience?