#1. Not sure where you can get new dust shields, or if they are even available. Maybe 50 resto.com?
#2. I'm not familiar with a wheel bearing kit. All items are sold individually and should be real easy to get at most any parts store.
#3. Air Impact.
#4. Yes, that is your lower ball joint. Replacement ones might come with a grease zerk. Make sure the zerk isnt busted off. If theres simply not one there, then it wasnt meant to be lubed.
#5 See #1 and #2.
Good luck
Andy