What ball bearings? DOesn't the 9B have journal bearings? You mean the thrust bearing?
Your best bet for parts may be one of the used machinery dealers (Meridian Machinery, Dave Sobel, Plaza Machinery, others) who advertise in HSM.
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Don't believe everything you know. -- Bumper sticker
Everybody is ignorant, only on different subjects. -- Will Rogers
Law of Logical Argument - Anything is possible if you don't know what you are talking about.