Michael,
Did you try that salt mixture I suggested?
About the steam wand, you need something that will hold up to high temperatures without getting warm to the touch -- a good insulator. PTFE (Teflon) would be a good choice. They sell this in sheets and various shapes in professional cooking supply stores. You can also get some
small Teflon balls and drill a hole in them, just to try it out. Simple, easy, and elegant. You can also get a roll of plumber's tape (Made of PTFE) and roll it onto the wand in a thick layer. Less elegant, but easy enough to try. And both options are about a buck.