I'm not sure what you mean by thrust bearing. I have a 10 year old
Windbugger that is just back from a factory overhaul. They replaced a
bunch of brushes and bearing and sent me the old ones for spares. I didn't
see anything that looked like a thrust bearing..

If you can give me a better discription of what you are looking for, I will
look my parts over and see if I can id what you need.

BTW. I purchased this Windbugger new on eBay for about $800 and the seller
had just spent $235 for the factory rebuild.. It's in great shape. I'm
starting my second season of living aboard 'disconnected'.. The Windbugger
and 2 solar panels handle everything, including a frig and TV, etc.

I haven't experienced any objectionable noise or vibrations..

Steve
s/v Good Intentions