Buying powder online isn't particularly difficult. It's classified as a hazardous material when shipping, so you have to pay a flat $25 (IIRC) per shipment. The

Buying powder online isn't particularly difficult. It's classified as a hazardous material when shipping, so you have to pay a flat $25 (IIRC) per shipment. There's no shortage of online stores that will sell it to you all day by the 8 lb jug.