Not an option around here. I wish it was.
The guys at the small engine shop i worked at part time years back used to lament the ethanol crap b/c it just destroyed power equip.
They wanted to start selling non ethanol fuel and use the tag line "Gasoline like it used to was...."
I've also noticed that the leaking area kind of "stains" the tank. It looks a bit like water marks. Unless they are everywhere (bad leak) it makes troubleshooting pretty easy.
C
I thought most of the heat soak / vapor lock problems happened in the carb. I know my carter afb was famous for it. Are you having trouble in the pump?