Where Can I Buy Black Salve?
In Australia, the TGA strongly recommends you do not use black salve. Black Salve is not banned because to be banned by the TGA, a medicine must have been approved at one point.
Black Salve is not illegal, however, due to the combination of ingredients, specifically zinc chloride and DMSO, the sale of black salve is not allowed. You can buy Black Salve from many places, a google search would likely direct you to reputable and non-reputable sellers alike.
The easiest thing to do is to make it. You can find instructions here showing you how to make black salve. I should mention that it is exceedingly wise to fully study this and other materials to satisfy yourself, that what you are doing is the right thing, and that you know exactly what you are doing and have a support person to assist you. We cannot for legal reasons comment on the effectiveness of this traditional remedy or how to use it. We cannot make it for you.