Got a leak coming from gear selector

Yes, there is a seal that goes around the shift select shaft. I suspect that if you can get the seal places other than a trans place but call a local trans shop and ask them where to get one if you can't find yourself. Not sure if you can recplace it without dropping the trans pan and valve body though.

It sounds like you could have something broken in the valve body anyway if the selector moves that much and you have no ratcheted click between the gear selects from park to drive so may be best to pull the pan anyway.