I did find them 6 months ago Stu and they have the 2 gears I need on the website. I need the bullgear behind the chuck and the gear that engages it. Can’t part off or cut threads until I change them. But I reckon its worth doing, this old bustard will see me out, no electronics to let me down.
Just in case your after something out of the box, I know a guy that knows a guys that still works for Hercus in Adelaide.
Very dodgy sounding, I know.