You'd be surprised Jono, it's more that Australian powder coaters only support a small range - they start the week with white, and end it with black. Dulux list 4800 different colours for powder coat. Prismatic in the US offer 6500.
I'd suggest asking your coater which brand they use, and if you have a wheel with some original gold left, see if they have it or can get it (and what the cost will be if they have to buy stock).