Well, the other side is the same. May be you soak them in some Wd-40 or sim over night and lightly tap them with a plastic hammer or so. Since you are talking it already apart and assuming all the parts are ok, I would at least replace the rubber seals that keep the grease in place. As Benz Dr. already said, all the upper and lower wear components are easily available from multiple vendors should you need them,
Good luck.