As far as forums go check out ls1.com.au & justcommodores.com.au
Google.com.au "commodore coil overs" etc etc... that'll keep you busy for a while
Pedders has a presence over there too..good catalogue here
http://www.pedders.com.au/products/5...FVGZpAodDA0AxA
Other Commodore stuff worth doing some research on (depending on budget) are Nolathane & Super Pro for bushes, Whiteline, Monroe, BC, D2, XYZ, K Sport, or Tein if you want to go spendy...