Mentioned above. "as it is a grey import to Australia, Honda dealers in Australia will normally not want to even try and help you. There are people that are Australian based that sell parts on the usual auction sites."
I'm in NZ my Honda dealer was more than happy to get parts for me from Japan. Even gives me 10% discount on parts I buy from him. I have bought lots from them though! I just gave him the part number (I used the parts catalougue on this site. Yes, a few are not right but you can work it out) and he could check against my frame number on the Honda system. If I didn't have the number we just looked at the microfiche on the computer to identify the part.
Parts are drying up rapidly as I check the part numbers in CMSNL for availability. Glad I renovated my MC28 a few years ago.
Good luck with it.