Wilcox and Flegal in Longview, WA sells one version of Sunoco leaded at the pump. I think it is 110 or 114. They also sell 5 gal and 50 gal drums of all the other flavors from 96 up through 114. The prices are very reasonable.
I also think Horsepower Freaks east of the airport on Airport Way used to sell high octane, but you would want to call first.
Mike