I had some previous info, which I lost, on part numbers for new Radius Rod Bushings (the rear traction bars). I think "Dave" ?? at PST had developed them. I can't rember if they were urethane or graphite.
The info you want is about 2/3 of the way down on this page: http://john.my67.net/Suspension.htm If you get a part number, please share because PST does not use part numbers in their literature.