Alternator Bearing Part No. trouble

[rob hod]

    My local Audi parts counter is slowly degenerating into one of those
sullen organisations where you never see the same parts counter monkey boy
twice.

    A direct result of this is that I only found out that I had the wrong
bearings for my alternator once it was in pieces on the bench. I wondered if
any one can help me out with a Part Number to help me fight the monkey boys.

    Car - 1988 100 Avant 2.0E, Auto tranny. RT 5 cyl engine.
    Alternator - Bosch 90Amp, Part number 026 903 017BX. What I want is PN
for the rear ball bearing assy (the one next to the brushes). I know the
wrong Pn is 054 903 221A 'cos thats what I've got, it has an outside
diameter of around 32mm whereas the one I want is slightly smaller with an
Outside diameter of about 28mm

    Anyone got an ekta they can check on?

    Thanks

rob