ComStar Valuline Evaporator Coil Cleaner, Economical Self-Rinsing AC Evaporator, Biodegradable, Non-Toxic, Neutral pH, Made in USA, 1 Gallon (90-910): Amazon.com: Tools & Home Improvement
Nu-Calgon Nu Brite® Condenser Coil Cleaner, Non Acid Alkaline, 2.5 Gal
Noble Chemical Tech Line 1 Gallon Evaporator Coil Cleaner - 4/Case
AC-Safe Air Conditioner Foaming Coil Cleaner AC-921 - The Home Depot
DiversiTech Clear Foam Coil Cleaner in the Air Filter Accessories department at Lowes.com