Mustang,
In NZ I always used to have good luck with Andy at ABs Ducati in Nelson. Small outfit, but good guy for modifications. They race older belt drives. I'd ride down from New Plymouth occasionally (long bus home) or check in with him on the way south for a tour of the better island
He's always been helpful with parts over the phone, well, once you know him and vice versa.Also there is a Ducati dealer in Hamilton I would trust for parts order and servicing, but that's prob too far up the north island to visit? They were really good at recommending good alternatives to OEM, long wait parts e.g. SKF bearings and viton orings from trade suppliers that are virtually identical, tried and true.
Cheers,
Mick