G'day Bigsquirrel,
There is only one "proper" B205 in Australia, operated by Helicorp at Essendon Airport. I don't know whether they do endorsements, however. Give Mark or Roger a ring and see what they say. There are a number of ex military UH-1's around, Helicopters Pty. Ltd. at Bankstown operate one and also have a flying school, so they may be your best bet.
Cheers,
MPT