Sagebrush Products also carries it. They're in Nebraska, and advertise on several of these boards. If you can't find their address let us know and I'll look for it at home.
They sell it in 8 oz. tubs for around $17.
I bought some, and tested it last month (I wanted to wait until the temp was over 90 degrees, and the humidity was 25% or lower. My normal lube works perfectly fine if it's not too hot or dry).
I compared it to my normal lube (Emmerts, with 15% LubeGard), and the White Lightning definitely kept the fouling softer and moister than my lube. So, it seems to do what it's supposed to. I never got around to actually doing any thorough testing, but I'll get to it this fall, and start using it in matches next summer.