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The Midwest F-Body Assocation forums has a thread that's been updated pretty often for stations that are selling non-ethanol gas.
http://www.mfba.org/showthread.php?p=513586
While the site is updated often, the information can still be out of date or incomplete. It's still the best place I've found so far.
On a side note, depending on where you live (if it's not in the greater Milwaukee area), Premium gas is often ethanol free. While it's about $0.18 - $0.20 more, it can actually save you money if no other non-ethanol option is available. Since ethanol can take away about 10% of your gas mileage, you can loose enough mileage to cover a gallon of gas.
Given the high cost of gas, 1 gallon saved is more than the cost of the premium gas.
Consider running the numbers. Record your MPG, figure out what you'd get with 10% better MPG, and see if the total amount of miles gained (gas saved) will benefit you.
Cheers!
