The DVD Features
Rotten Tomatoes seems to have a list of the DVD features, I don't know if they're available elsewhere, but anyway, three featurettes, it seems:
Featurettes 1. THE RISE OF THE CONFORMIST: THE STORY, THE CAST
2. SHADOW AND LIGHT: FILMING THE CONFORMIST
3. THE CONFORMIST: BREAKING NEW GROUND
No info about running times for them.
"You get tired of your own obsessions, the betrayals, the voyeurism, the twisted sexuality"