backpack blowers and ethanol

[A+Grounds]

every time at about this year the gas stations crank up the ethanol and one of my redmax ebz8001s suffer from it. throughout the year this backpack does not have the same power as my other 8001 and am looking to replace it. yes i have checked pure gas.com and there is no stations around me. i have tried shell, bp and mobil (local gas stations) 93 or higher octane and all of them make this 8001 run like crap. it has had a carb rebuild on it so the blower itself is fine.what is the most powerful backpack blower out there that is the least susceptible to reacting to ethanol.