First check the stickys in the forum you posted this in
Here is a thread on mechancial workshops members use
http://www.perth-wrx.com/vb/mechanicals/6775-perth-workshops.html
Here is one about tyre and suspension shops
http://www.perth-wrx.com/vb/mechanicals/20098-tyre-shops.html
Also have a search using terms like "coilover" or "suspension"
http://www.perth-wrx.com/vb/search.php
Once you've done a little basic research, then we can expand on your questions.