Ralph,
Call fuel distributors. If you needed to buy high octane race gas who would you call? Most of the businesses that carry this stuff are not open on weekends.
Open the phone book..look under automobile race cars, automobile racing, race tracks, look for race car fabricators(chassis shops) and ask them who locally carries "racing alky", "racing alcohol", etc. Look for Sunoco, BP, Torco, VP, race fuels.. contact race fuel distributors and see who carries it.
I bet you'll find it.. be firm in your committment.
At least special order is an alternative. See how much they get for a 5 gallon pail? There is always the 55 gallon drum alternative.. thats usually 100 dollars or so.
Lastly there are cheaper sources for denatured than Home Depot. It is the most expensive for this stuff. Call any local non-chain hardware/paint store and get a quote for a 5 gallon pail/can.