The footage certainly exists. I asked the film's editor, Anthony Harvey, about the original ending, and was told that the footage was in place, but was removed after the Kennedy assassination, which occurred only eight weeks before release. It's interesting how many films either in production or about to go into release were affected by the tragedy. The actual lift stayed with Mr. Harvey for several years, and when he came upon it amongst his things, he returned it to SK. I'm told that the studio has made efforts to add it to this, and earlier DVD releases, but apparently for whatever reason is has not been made available to them.