This afternoon’s project was to investigate the excessive axel end play. I pulled the axel with the intent of changing the axel bearing. I swept the inside of the housing with my finger and found a piece of gear about a half inch by two inches. When I pulled the axel on the other side I came up with another piece of gear. I pulled the gear set and there are two teeth broken off the pinion, oddly 180 degrees out. Upon inspection with the naked eye there is not a scratch on the ring gear, it looks perfect.
I do not really know much about gears as will become obvious with my following questions.

Is it possible to replace just the pinion or is that stupid?

Is it possible to even buy just a pinion?

This is a 5.12 r&p, is the pinion different in a 5.12 vs a 4.88 or a 4.40.