I got them to supply it and everything so it would be a bit more haha. I forget the exact price cause I got V&E to sort it out when the my CA converision was done and that's who they use.

Yeah there's a few places In Canberra that could do it.

M&A Engineering in Canberra have a good reputation locally

http://preview.hotfox2.com.au/MandA/?page_id=27

There is also the Diff Doctor:
http://www.whitepages.com.au/wp/cp/diff-doctor-550264903N04W-N04W%23215267699%23Diff+Doctor.html

& Southern Differentials:
http://www.yellowpages.com.au/act/phillip/southern-differentials-12173197-listing.html

No real websites just contact details lol.

Craft in Sydney also seem to be popular if you trawl through magazines.