It sounds like your carrier is worn from running bad bearings too long......
Yes, you can get some shims, they have "shim kits" from .001-.030 but it has to fit tight; It's gonna constantly be forced upon.
Loctite also sells a product called "cylindrical Loctite", it's not cheap but I've seen it work in industrial applications. It takes up the play between the bearing and the swinger but both must be spotless before you use it.
This probably won't last long and is a quick fix at best. Worse comes to worse, get another swinger and set of bearings. Old machines aren't easy to get tight again..........
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country