Amazon.fr sells a DVD of this under the title "La Riviere du Hibou". It contains not only the film "An Occurrence at Owl Creek Bridge" but the adaptations of two other Ambrose Bierce short stories, "Chickamauga" and "The Mocking-Bird". All three are by the same director, and these form the trilogy from which The Twilight Zone derived a slightly edited version of "Occurrence at Owl Creek Bridge" for American television audiences. Thanks to Warner Home Video, you can now watch the entire trilogy.
The good news: the audio is in English (the inner voices of characters are in French, but in Occurrence these are very brief and unobtrusive), the French subtitles are removable. The sound and picture have been digitally restored, the sound quality is very good, the picture quality is excellent, stunning in places. "Occurrence at Owl Creek Bridge" is presented in it's original full length, with the original French title sequence. You have never seen this film look this good.
The bad news, you'll need a multiregion player to watch it on, it's a Region 2 PAL disk. And this DVD will cost you a bit more.
Buying from Amazon.fr is simple, you use the same login as your account here, plus you can use the Google translator to get through the French menus if you are unsure. But it's easy, English is often just French pronounced poorly.
If you are not so adventurous, by all means petition Warner Home Video to release this DVD here. Very, very little work would need to be done to ready this DVD for the North American market, and based on the passionate comments about this film here, there may indeed be a strong market for it.