Hey Mate ,
I had the very same problem , Car started to squeak a bit , took it down to CenterLine in Melbourne.
Spoke to Chris ( Awesome group of guy's to deal with by the way) and we decided that it was time to replace every bush, includes new sub frame bushes, lockbar, new coilovers ect....
I do plan on making a tread about the build.
Anyway this may help you to do with bushes ect...
bushers.pdf