How hard is it to replace those bushings?
Unscrew the visor from the roof (3 screws)
Unscrew the one one screw that holds the metal shaft in, pull that out, and the bushing is there.
More difficult getting the whole thing in with the new bushing without breaking the bushing. Might also be an electrical connection that goes into the visor, so dont pull too hard on the shaft.
If you do pull too hard, will have to take the mirror off to put the connector back on.
I took one visor apart and made the mistake of spraying on some electrical cleaner. The stuff you use to clean starters. I usually use electronic cleaner, but was out of it. Within a minute, all the springs jumped out and the interior of the visor was cracked. Reading the label on the back, that stuff eats plastic. Nice.....