It was on a DVD collection called SHORTS a few years ago.
I believe it was made as a means of selling the film to potential investors. If my memory is correct, I read once that William Hurt did not want McDowell in the final film.
I like the short better than the full film. The scene is faithful to Welles script except Hickenlooper changed one of the Menaker dialogue bits. The reference to Harvard was replaced with Yale (Hickenlooper's alma mater).