Alan,
Corvallis lifted the quarantine as we were aware because we received scion wood. A presumed virus such as stonypit you get from an individual is something easily spread with a grafting knife in my opinion but I’ve never tried it. Corvallis is a source for scion wood for my farm because I think they are extremely reliable and credible. If they say there is nothing to be concerned about there is not. Many pear trees such as Doctor Deportes are virus infected which is not ideal but rather tolerable. I do grow that one as you may be aware. See this link Why are pear scions and rootstocks so hard to get this year? Quarantine is not just Corvallis