I would just go with the bronze at ~$2.50 a corner instead of copper.I'm assuming the felt-type spacers for these wheels are nothing available anymore?
Would a copper sleeve suffice vs bronze? I ask because I have various small pcs laying about that could be used as such.
I have one 19-in with these style wheels and they are in fact, wobbly and it bugs me. I had planned on looking into a cause and fix for the issue.
And yes my updated set-up still uses the factory felt washers in place.