Windshield washer fluid in low temps?

As a second home owner at Mammoth Lakes where sub zero temps are the norm in the winter I too was looking for WW fluid with the lowest freeze point I could get. For some strange reason, isn't it always in Calif. you cannot buy WW fluid with a sub zero freeze point in Los Angeles. I wanted to change before I left to go up and found out you just can't buy it here. Some auto parts stores will special order it but you have to buy a lot and they charge the devil for it.

I have half a gallon if you really need some low freeze point fluid. If you can wait until you get to cold country and then buy some.