You could call the Edelbrock tech line and ask if their pump 1720 is alcohol compatible, 1-800-416-8628. Info online doesn't say, though for the Holley pump it does say not compatible, but I suspect they mean 100% not E10.

I have run into this very issue myself with off the shelf stock pumps.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.