I don't know shit(shite?) about being a shipping agent, but would be glad to help if someone needs something, say from one of those nimrods who won't ship outside USA.
As far as the 500-600, I think that is often to get to a port in Long Beach( Los Angeles) California. As far as shipping agents, you may want to speak with Firko or Dave Mac, as I know they have shipped many bikes/parts. If you just have a part, but need to get it, I will help-in fact I beleive I indicated as much on here earlier. I guess I could bid for you or could have it shipped to me and I send to you( shit that has got to add up$ for you), but will try to help.
I think my e-mail link works from here, so let me know. Wonder how much a flight to Oz is from here?
James