Here is a pretty good listing:
Ethanol-free gas stations in the U.S. and Canada
I had been buying at in Belleview, but I understand that the location is having a major storage tank upgrade and I do not know if they will continue to have ethanol free or not.
I the link above you will find listings for Leesburg, Tavares and Ocala ... but the closest might to the Lk Panasoffkee location which is at the I-75 ramp.
I am hopeful that the new Marathon location at Pinellas Plaza will carry it as lots of Marathon locations do (but unfortunately not the 44&301 loction in Wildwood)