You want to *really* be obsessive?
Repair your gear so that it conforms to it's original dimensions, and
clean / deburr it so that it is *exactly* the same - then make a lost-wax
mold of it to then do an investment casting of it in bronze....
OR: Find a similar replacement in Boston Gear (or others) and have the
center broached out to conform to the shaft.
This of course is **way** more than a really nice VCR is worth... but
it's the Principle of the Thing... ;}
Cheers
John