State records show Grayson County is 979 sq miles so not that large. Just outside your county to the east in Bonham there is one station that sells ethanol free and to the west of your county in Gainsville there are two stations that sell ethanol free gas that I can find with less than 2 minutes of research. There may be more since you are much more familiar with the towns in the area than I am.
Do not state "there is no such thing anymore....not around here" when there definitely is in both places. If you chose to not use it that is fine but do not denigrate those that chose to do so for reasons that have been shown to be valid
By the way there are testers that are available that in 10 minutes will tell you just how much alcohol is in your gas that run about $8-$9 and can be used forever, if you do not drop them, (they are glass) and are very easy to use.