You can typically find the .srt files for this specific release on major subtitle platforms:
: A comprehensive database where you can search by the exact filename "Alien.Autopsy.2006.1080p.WEBRip.x264-RARBG." subtitle Alien.Autopsy.2006.1080p.WEBRip.x264-R...
: Often features user-uploaded subtitles specifically timed for RARBG releases. You can typically find the