For something like that, I would use threaded rod and a socket/washer combo (the next size smaller than the bushing) to push the bushing out from the backside while using a larger socket at the opening. This is all assuming the whip strut bore is one diameter.
I think mine need replaced too, just pulled my v-drive gearbox to replace the lower seal and there seems to be alot of play out at the propeller. Any idea of how much is still ok??