Bob Harris of Biograph Films/Image Film Archive (and Lawrence of Arabia and
My Fair Lady fame) tried for years to get the material in from France for
distribution. I assumed he was never able to suceed but you should try them
just to be sure. Biograph's number is (914) 242-9838.
Please make sure they know that you're looking specificially for the silent
1919 version since they do have the 1935 (or so) talkie by Gance which is not
very good in comparison.
Milestone Film & Video