There are several high profile Australian businesses that import grey market bodies and lenses. Lately, the prices have been on par with the USA - especially if you are able to claim back the GST. They generally offer warranty options. Its only by buying from overseas, or buying grey market that Canon Australia will realise that we're part of a global economy and pick up their game. Personally, I've never bought any Canon from an Australian retail shop. In some ways, I feel a bit sad about that. But for me, the price mark-up is too high.
If you don't own your own business (and can't claim back the GST and claim depreciation), discuss salary packaging it with your employer. Provided that you can show that it is:
A tool of trade (after all, I assume you take photos at work??);
That it is a "portable electronic device" (it could be - it fits the definition, but this section was intended to cover laptops and phones and I haven't had to look if cameras are included); or
Is otherwise deductible (because you'd be able to claim a deduction on your personal return),
Then, a $9900 camera will actually end up only costing between $4815 (if you're on a 46.5% tax rate) to $6,165 (if you're on a 31.5% tax rate). This makes it a bit more palatable.