Brian,
I have been using an excellent plater in Perth.
His name is Anthony, and he operates "Aeroplate".
He provides a wide range of quality plating services, including Cadmium, which is the finish I prefer (including for my Japanese bikes!).
He initially provided plating services for the aircraft industry, but has expanded into motorcycles and cars, etc.
I also use him for components we manufacture for the fluid power industry, and am very satisfied.
He also offers other finishes including the matt black type common on Japanese bike clamps and exhaust shields.
He is very fussy; it must be his aircraft background.
If you are interested in contacting him, let me know and I will provide his number.
Richard