These sites list subtitle files specifically named for the BluRay and x264 releases you mentioned:
If the specific release-tagged file is unavailable, these libraries host various English and international SRT files for this film: subtitle Original.Sin.2001.1080p.720p.BluRay.x2...
: Available on Google Play to search and download multi-language subtitles for movies and TV series. These sites list subtitle files specifically named for
: Lists multiple versions in languages like English, Spanish, and Arabic. subtitle Original.Sin.2001.1080p.720p.BluRay.x2...
: An Android app that pulls from major providers like OpenSubtitles and SubDl. Original Sin (2001) Subtitles - My-subs.co