Don't bother going to pedders, they're useless.
It's not in Melbourne but Chad's Off Road Setups in Geelong might be able to help you out. I'm not to sure if he's dealt with car coilovers much but he's well equipped to work on dike bike, road bike and off road buggy/car suspension.
I pulled down and serviced my own coilovers, I just had to go to him to fill them with nitrogen.
http://chadsoffroadsetups.com.au
It's worth calling to see what he can do.