Newbie here also

Although I have converted my diesel Suburban to WVO, Listers are fairly new territory. I am interested in running a lister on WVO to provide electricity for my residence.  I have read this forum for quite a few hours and have not seen anything that answers the following question (maybe I missed it):

I see Listers were manufactured quite a few years ago. Were the prevalent in the US and/or Midwest? Put another way, What are my odds of finding one of these for sale at a Minnesota farm sale?

Is it true you can find parts for the old ones and they can be rebuilt good as new?

Thanks