I'm in BFE Mississippi and I doubt anyone within 1000 miles of here gets or makes enough fuel to sell it around the $10 mark.
What would the costs be to mix it myself? I really don't have a problem fronting the money (if it's not TOO bad) to mix it, though I don't think there is any worthwhile club near me. I'd have to have a way to store such a huge amount of fuel without it going bad.