My alternator just got stuck on its bearings this morning - and broke the belt in the process

Now, I have the replacement belt - but what should I do with the alternator? What kind of bearings(dimensions? serial no.) should I use? (Side note: there is a ball/roller bearing shop nearby)

~Thank you,

Nautilus

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1990 260E Sportline (that's 300E 2.6 for our American friends) -> sold
2001 E320 4Matic Elegance -> my Dad's daily drive
2005 Seat Leon FR 1.8T