Your 22 Hornet probably has a 1:14" twist, it's pretty much standard anymore. I think you could just rechamber it and fix the extractor and be done. Check chamber dimensuons to be sure. You'll probably have to mess with the mag to get it to feed.
You might check with CZ USA to see if it's cheaper to just buy a barrel and mag than get the chamber reamed.
Never try to educate someone who resists knowledge at all costs.
But what do I know?