4 digits number alternator ford laser

[un_incompleted]

I'd like to replace my bearing alternator ,but i couldnt find out what the 4 digits number for the bearing itself because I havent dismantled the alternator. anybody can help me with this number. My car is Ford Laser '89 KE model, and my alternator Mitsubishi, here's my alt detail, I found it outside the alternator body
IC REG. BUILT IN
B366 D
12V 65A 9Z17
MITSUBISHI

Cheers