A few notes:
1) Films missing are mainly hardcore porn and TV shows (Hitchcock mysteries namely). There's a number of others missing as well from Letterboxd. I have a small list I'll be adding to TMDB so hopefully this can be rectified overtime.
2) Leave a comment if you notice a film missing from this list that's on Letterboxd, I'll add. Same goes for if a film is on here but no longer (or never was) available on Rarelust.
3) Letterboxd can only show a max of 128 pages of results or 12,000 films. This list has more then that so you need to filter to find things.
4) I tend to be an update or two behind.
5) All credit to Rarelust.com for providing a much needed service archiving and providing these films.