HandyAndy Grinder

[scottg]

It kind of looks like any old 6" wheel will do. Your choice of  manufacturer and grit size. Everyone in the grindstone business makes 6 X 3/4 x 1/2" arbor hole.  Or 5 X 1/2 whatever it wants.
 Just use the plastic bushings down to your 3/8"
   yours Scott

[strik9]

   I have a modern made version of that I bought about 7 years ago.    I replaced the short crank handle with a long throw for more power and replaced the flimsy original rest with a substantial one made of angle iron.
     I did shim up the arbor to take a common 6" stone using rubber gas line cut just a hair long.      Compressing it made the middle expand and the stone runs true.

    End play on the shafts is horrible on mine, doesn't seem to affect how it works though.

   Get grease in the gearbox to smooth it out, black moly grease for CV joints is good in mine.