Being a machinest I can make my own bushings and so forth if something like this does come up ,but I don't have a clue as to how much tape I have used over the years for a fast easy fit of a loose prop. One thing I will do if the bushing is very thin I will open the center hole up a little in the prop so the bushing will have some side wall to it .
One last item when drilling out any prop it's a good idea to use a drill press and drill the prop from the back side, also the wood drills quite easy don't rush it and clear the chips or in this case wood from the drill flutes often, That will help stop the drill bit from building up and wandering.
PS a good sharp drill is a must also preferablly a new one that is just used for drilling out props.

Robby 368 I would do as others have stated and dowel the bad holes and redrill the prop, it should be just fine.