I'm currently listening to ST:Outpost which is a lot like DS9. It tells the story of DS3 and it's crew. DS3's captain is extreme about waste management and has the station running at extreme efficiency, leaving it a barren and forgotten place where careers come to die. The crew have learned to deal with this and to make the best of what they have, which oftentimes involves some creative solutions.

It's a full cast audio play on spotify. It has roughly 84 hours of story. I can heartedly recommend it.