gonna go out on a limb here...and ask did you ever think to google it?
i googled "shock absorber rebuild brisbane" and came up with this.
(in the first 3 posts there are 3 companies to try)
that place looks a tad gineric, but it woudl be worth a call.
here is another one
give them a call and ask them....only way you are going to get a definate answer.