Then don’t buy any.
When I find stations that sell non-ethanol gasoline, I buy the non-ethanol gasoline. In my neck of the woods, finding non-ethanol gasoline is difficult. I also drive around and across the USA two or three times a year. Non-ethanol gasoline is difficult to locate along America’s highways and byways.
Putting corn into gasoline is a poor use of corn. Having the federal government mandate this use of corn is a poor use of government.