Check out http://www.pure-gas.org.
Non-ethanol gas is called “recreational gas,” and many marinas and gas stations sell it. Perhaps there is one near you.
I use recreational gas in my 1990 Airstream motor home and my 1991 Cadillac whenever I can — both run better, get better gas mileage. And, in my own small way, I’m sticking it to the environmental whackos when I use it.
At the marina it is extra.