Did you receive an email from Tesla indicating your car was eligible for the camera upgrade? I've seen earlier reports of owners getting an email and, once they get it, there's an additional option in their app allowing specifically requesting this camera upgrade. Was that the process for you?
I've been waiting for some kind of news with my 2017 Model X, but still have heard nothing. I found this thread while searching for other people's experiences. I already have FSD computer + MCU2, just not the camera retrofit. I'm glad they've started doing Model X - a service center employee told me a while ago they had started on the S but not X.