Help! Do you know any reliable resources for finding a company/translator to do accurate Chinese subtitles for a movie?

I've been working on a project where the producer is interested in adding Chinese subtitles to a full-length film. Do any of you know any reliable resources/people for finding accurate, colloquial Chinese subtitle translation? Meaning that someone isn't just putting English into a machine and pressing "Enter" to turn it into Chinese. Any help is INSANELY helpful.