Smoking ignition switch...scary situation

[kurts72]

yesterday I was driving my truck in the middle of nowhere on the interstate in IN at night when I smelled smoke. Smoke was bellowing from under the dash. I shut the truck off and looked underneath at the ingition switch (try doing that on a new truck!) and one of the wires was melted on the switch. I pulled the wire off the switch and then the truck wouldn't turn over. I then touched the wire onto the switch to start the truck then and once running, I pulled the wire off and it kept running.
With the wire off it was ok, no smoking/melting. SCARY. I made it home. I'm assuming the switch is defective after all these years. Maybe the starter should also be replaced which is causing shorting out... Anyone ever had this happen to them? Can one still order ignition switches for these? Thanks, Kurt