I have a buddy with a 2000 Park Avenue Ultra with about 240,000 miles on it. His sway bar center link bushings are shot and his sway bar is bouncing around while he drives. I tried to get a measurement on his sway bar but couldn't get an exact number. Some sections is was 28mm others it was 27mm. Anyone know the correct size of the sway bar or can link me to some new center link bushing? (polyurethane would be great too)