The Meditations of Marcus Aurelius is also available as a free audiobook at Librivox, but it's a collaborative effort, so I can't guarantee the quality. It's been my experience that their books that are read by a solo author tend to be better than the ones that are the result of a group effort. I'll add it to the list, anyway.
https://librivox.org/the-meditations...rcus-aurelius/