https://www.pure-gas.org/Click on Texas then scroll to Tyler. You said you called a few places so you may have already been here.
Not always 100 percent accurate as I think they depend on people adding stations that have ethanol free gas, but when they stop carrying not sure if people are as good at removing. Good place to start.
Boat marinas have ethanol free gas, which isn't a bad option depending on how much you need.