91 and 93 octane straight premium is still sold in Missouri.
Yes but you have to search for it and it is super expensive. It is the only thing I use for small motors but only one station within 30+ miles sells it and when I picked my spring supply up it cost $2.55 vs. $1.60/gal for standard gas at the time.
Barely mentioned in the article is that ethanol gas is terrible for small motors like lawn mowers, trimmers, chainsaws, tillers, ect. The motors run like crap and cut out constantly at best, and you may have to rebuild a 2-strokes carburetor for every tank of the ethanol crap.