I found some long tubes on the web from a guy who bought them to go with his Mustang II front suspension (he realized he didn't need them). $100 and they are original in box, unused Ford Motorsport pieces. Still have the crappy #1 going under cross member though.
Just search the web or lay down $350 and buy some from O'Reilly's. If you look through their books they have them, and I called the company and they had them in stock 2 yrs ago. They are Black Jack or Hedmann's I can't remember, but they were in stock despite what everyone said.