Nelson,
I totally rebuilt my WW last month and found the bearings at the local industrial bearing shop. They are a common one, just $8.00US each. Take one with you and they should be able to match it up. If they try to sell you something more expensive just ask for alternatives. Give me a yell offline if I can help you with any other questions.
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Karl Miller
Lark Label
Custom Imaged, Solid Metal, Plant labels