Here is the cover that was on mine:
View attachment 1716498826
In regards to replacing/greasing bearings and such, I don't have any good input. All I have ever done is take them apart and put them back together.
I would caution you on replacing the turn signal switch though. There was a thread recently about how the replacements are remanufactured and aren't right. I will try and find it and post a link.
The key switch is a maybe, but only if you wanted to try and make an F-Body switch work so you didn't need a pushbutton start circuit. Not sure what your plan is, or even if it is needed for your setup. I was going to go with an F-Body switch, but I think I am going to end up using a late model Charger WIN so won't be doing either. But if you plan to use an A-Body ignition switch and your current one works, not sure I would replace it.