I recommend looking in a phonebook under chemicals, and find a chemical supplier that stocks these products. I purchased a gallon of each chemical for $80.00. Which will end up giving me approx. 7-13 gallons of fog fluid.
"I mix them in varying degrees, I do not mind replacing a heat exchanger, I use a Roscoe fog machine (they are the best) it allows me to easily replace the exchanger. In this unit I mix a 50/50 chemicals of one gallon to three gallons of water, this is thick and does not need refrigeration to hug ground because it is heavy. If replacing heat exchangers is not your style 50/50 chem. mix of one gallon to four gallons of water. You can mix up to six gallons of water to one gallon of 50/50 chemical solution to good effect." JB CORN
I personally tried a solution with a 50/50 mix of chemical solution(1gal) to 3.5 gal of water. It worked perfectly. I recommend regardless of what kind of fluid you use to flush your system with water after each days use. I am going to keep experimenting with these chemicals, but so far I'm making my fluid for approx. $10.00 per gallon. A big savings, and I can customize it for the effect I'm going for.(the more water added the higher the fog raises and dissipates at a greater rate)