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.
Looking up some information: Kamen Rider Faiz: Paradise Lost was released in 2011 in Japan. There's a theatrical re-release for the "Kamen Rider 20th Anniversary" in 2016, which might include some additional content. Also, sometimes the DVD releases include bonus material. kamen rider faiz paradise lost director 39s cut link
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. First, check if the movie has an official director's cut
I should also mention that direct links shouldn't be provided due to potential legal issues and link rot. Instead, directing them to official sources or platforms where they can legally access the content is the way to go. Also, some movies get released on home media