I'm still one of the few in my area that will replace a simple broken plastic Bendix gear on a starter for a customer. Of course there are many who are just cheap price shoppers so they go for the poor quality aftermarket starters. Most don't want to fuss with the pesky spring clip design.
I have a small collection of reconditioned starters that I keep on hand. If the armature has not been smoked, I would rather recondition an original