Does anyone know where I can find the 2 rear bearings for the supercharger rotors? And how to take them off?

Search. Long threads on this subject. FWIW, the bearings are custom made. Several of us went in on a group buy through the Australian distributor to obtain them from the Japanese manufacturer. Lead time was six months.

Bearings should be available from IHI out of Australia.

Advanced search says, "start here":
https://mbworld.org/forums/w211-amg/...ercharger.html

Ebay. $80.00
Put in number 375955583619 in the search.

Thank you for that, and by any chance could you lead me where I can find introductions on how to replace them?

"Broke it real good for sure" post and scroll towards the last pages and that may help you.
They can be a fighter to remove so be ready and have a good propane torch.
I had bought my bearings in the group buy like bbirdwell and they are great quality but the Ebay units are good from the company that makes them.

Try online forums or Eaton guides, removal needs heat and puller.