oh sure there's a possibility that it COULD exist, but the fact of the matter is that you're never gonna find it. and why would you want to? it's heavier molecularly than meth HCl so you're getting less bang for your buck. amphetamines sold commericially, including pseudoephedrine, are generally sulphate, and it's in the manufacturing process by clandestine chemists that these salts are replaced with HCl. It has to do with solubilities in certain solvents.
maybe desoxy is a sulphate, who knows/cares