The camber is set by the distance between the wheel and the body, fixed at the top but determined by the length of the track control arm at the bottom, you can get in situ adjustable arms, but a bit pricey.
As to the poly bushes there are many makes, I have used superflex/powewrflex/deflex/flowflex(was deflex) and super pro who make these for superflex.
I have found no difference other than price, and have been using them years, normally get superflex from chris witter.
tabetha