I was pleased to find a place selling 100% gasoline in Loris, SC today. They also have it available at their North Myrtle Beach store.
Their owner says they will offer ethanol-free gasoline as long as it is available to them.
Ford's Fuel Services, Inc.
Attention: Customer Care Center
4115 Holly Street
Loris, South Carolina 29569
Fords Fuel and Propane-North Myrtle Beach
1519 Old Hwy 17 North
North Myrtle Beach, South Carolina 29582
843-249-1614 or 843-249-4300