5.9L Magnum questions

The ongoing saga has brought about 2 new questions- never pulled a roller cam before. Was going to send this cam to Oregon Cam to see if they can regrind. Does this type of wear make it useless? The associated lifter looks fine.
Question 2- best method for replacing cam bearings? Any help would be appreciated.

20240916_154125.jpg

20240916_154111.jpg

20240916_154032.jpg