Sounds like you have done a lot research already. If you are just replacing a bad CVT with a used one, I have to believe some local mechanics would do that for you.
Plan B may be buying Fummins a round trip plane ticket to Atlanta, & stock piling your refrigerator with beer! :)
Speaking for myself - If I were in your position, I would focus on paying off my Mirage asap first. Once it is paid off, I would start putting aside funds for things like a CVT replacement. If those funds aren't needed for that purpose, I would put them toward a future vehicle purchase.
I believe my small town mechanics would replace a bad CVT with a used one. I wouldn't expect them to rebuild a transmission (automatic or CVT), however. If the used transmission they install has issues, that would be on me not them.
Have you contacted these guys?
http://www.allprotransmissionga.com/...ssion-rebuild/
Given how many miles you drive per year, what year would it be if your Mirage's CVT went out @
100,000 miles?
150,000 miles?
or
200,000 miles?
If I was that anxious about something, I would remove it from my life. If that was taken the wrong way, I apologize. I was only speaking for myself. I own a lot of old stuff. I expect it to break down sometimes.
What will give you peace? If buying/storing a used CVT is the answer, I hope you find one soon!
P.S. - Many of us have more than one job. I teach middle school science, coach basketball (girls & boys seasons), & do btw driving lessons on Saturdays (& during the summer months). Plus, I cut/burn some firewood, love to hunt, & do lots of other stuff.