You can take off the bearing and bring it to NAPA. They will measure it with a caliper and find a replacement SKF bearing (good quality) for replacement. I have also heard of folks just taking off the air pump since it is mainly just used for cold start emissions.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth