Your local Holden dealer, or any other company/mechanic for that matter, would have no problems at all servicing the car and sourcing parts. Holden would have most, if not all, regular genuine service parts in stock and most companies can get you aftermarket parts as well. If you use a local mechanic, you can always negotiate to supply your own parts which can be bought from overseas very easy and relatively cheap. Your Holden dealer would have set prices for services so i'd ask for a quote prior to a service. You're right, it is a very nice car indeed.