you're looking for a calliper with 'VWII' stamped on it, loads of VAG across the range use them.
MK2 Golf except 1.3 & late 16v/G60, MK1/cabby/scirocco 1.5-1.8, MK3 Polo G40, MK3 Golf 1.4-1.8, SEAT Ibizas etc etc list goes on.
Just be aware very late models may have a different brake hose fitting on, so check that