I noticed a loud creaking noise whenever there is any slight incline on the passenger rear wheel. Checked endlinks, sway bar bushings but concluded it might be lower control arm bushings. First off, I am not sure why it is impossible to find lower control arm bushings for an 02 Celica, but I only found one site that sells for my specific year. Its energysuspensionparts.com and they want about $125 for polyurethane rear control arm bushings. Is it worth buying or just buy a new control arm?