Has anyone got a dead Xerox XRX-81S shredder?

I need a spare: shredder shaft driven metal gear wheel (11 teeth with a hexagonal shaft hole), for a Xerox XRX-81S shredder.
It is normal for one or more of the plastic gears to go first, so a dead machine would more than likely contain this gear that I am looking for, in it, in good condition.
hopefarm at sky.com