As a last resort, thread the bushing with a 1/4" or 3/8" pipe thread, and adapt down to a grease fitting with a 1/8" pipe thread. Put the grease gun on it and pump it out. I can't imagine that it wouldn't move with several hundred PSI of grease pressure.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!