What part of Australia are you in? The problem with a one-off (if you don't have a machinist with equipment available who is a friend and willing to help you out for a case of beer and a bs session) is that set-up fees and programming time can easily cost 90% of the quoted price. Have you tried Harrop? There are quite a few Aussies on here with personal CNC mills...you might want to ask them if they would be willing to try a non-personal project as a favor for a lowbuck option...I would suggest buying the material and paying all shipping costs as well as any "special" tooling they might suggest. If you lived here in the US, I would suggest eMachineshop.com...however, that would require you redrawing the part using their "special" software...or forwarding them a copy of your 3d rendering and having them "convert" it for a fee. If my machine was up and running I would offer to do it for you, but as I am in the middle of a move, I am unable to offer my services.