I need the same part. I tried to fix mine. Bearing bad. Destroyed everything taking it apart. It'll be cheaper, I'll bet, just putting in a new head.
Please contact me if you've found out where to get one. If not, I'll contact you when I do.
Lanny Cotler
lcotler(AT)willitsonline.com
707-367-1812
Lanny, May 2008