~ I had PSE Superchargers rebuild mine, and supply me with the last 2 known OEM pulleys and bearings from a Fiat warehouse in the UK. It's on a shelf as a spare in my shop. The price was not cheap by any means. Over 5G for all.
~ I was told that to remove one of the bearings, not sure which, the unit needed to be heated to around 800 F in an oven to melt the epoxy from a grooved bearing and that any other method to remove that bearing usually results in damaging the casing of the S.C.
~ Your photos reveal that the teflon coating is gone from your twin screws not to mention the scratches. I didn't spot the bearing with the epoxy groove but I am curious how you removed it.