with two missing teeth? should be easy enough to repair, there is not a lot of torque on these so a wedge of aluminum glued in should work - free if you want it - I'm going to list a complete 109-20630 lathe if a local buyer doesn't get it by tomorrow, and this gear turned up as I was making up a complete set of change gears for it. just pay postage
in researching this lathe, I ran across a cool article on some mods to make it a lot better, here