Also, considering the user's request, they might be referring to a version available on video-on-demand platforms. In the US, Funimation often handles Kamen Rider releases, but I'm not sure if they've released a director's cut. The original movie might be available on their site or others.
But the user might be looking for an English-subbed version. If the director's cut isn't officially released, some fansubs might circulate, but I can't recommend those as they're often pirated. kamen rider faiz paradise lost director 39s cut link
First, check if the movie has an official director's cut. Sometimes movies get re-released on Blu-ray or DVD with special features. For Kamen Rider movies, official releases in Japan might be available on platforms like Amazon Japan, or through official distributor sites. Also, some movies get released on home media with extended versions. Also, considering the user's request, they might be
Alternatively, if the user is in Japan, they can look up the official Toei website or services like Netflix Japan (though that's closed). Amazon Prime might have different releases in different countries. But the user might be looking for an English-subbed version