Theres Classic VW in Kirrawee. Ive never had work done there but I have bought some parts there before. He only has german stuff so was pretty pricey, and Id imagine his mechanical services are not cheap either.
A mate uses a guy out Padstow way and he reccommends him. I dont know the mechanic personally but if you want to know more, send the user Rattler a PM and he could elaborate more.