What Is This?

Good luck finding the bushings. The dealer offered to sell a complete weight with bushings, but no individual bushings.
My fix was to find a truck repair center. They had some heavy rubber air line hose for the tractor trailer rigs that was the perfect ID & OD size to replace the bushings with.
A couple inches and I had it back in "better than new" as this air line is resistant to oil & transmission fluid.
C

PS - I drove the car it was in (an '88 Gran Fury) for a couple months without the weight. I could tell no difference when I put it back on. When I transferred the set up to my Duster I kept the weight attached.