Found them, was an earlier commit: https://www.opensubtitles.org/pb/subtitles/8628153/the-courier-en. These are just the Russian parts, not subs for the entire film.
@segein thanks but those only give subs for the English parts of the movie, the Russian part subs aren't there.
The trailer is for the wrong film, it's for The Red Baron from 2008. Correct trailer is here on youtube: XIErNPETMGM