Hi Rick,
If you only need 5, you could make them on the lathe, or con a friend into making them for you.
Rudges have the shafts rivetted into the flywheels. An experienced friend once advised me to try everything before resorting to un-riveting the shafts, as they are difficult to re-rivet and get a result which is both tight and true. I have seen some very nice jobs where the rivets have been replaced by high tensile (Unbrako or similar) screws. If you're not an expert riveter this might be a good alternative? (Usual disclaimer: I'm not an engineer!)
Cheers
Leon