Calcium chloride ist mainly used to dry buildings, so you will find it in building supplies stores. But I would not use this for injections, because it's chemically not pure and nobody knows, if it is contamined with substances, which will give unwanted side effects. Every pharmacy should be able to order calcium cloride for little money only. From pharmacy it's pure and safe for that application.
I am also interested in this method, but still I am collecting information.
