I had a look at the submission guidelines for Bella Books just now. I think that I can tick all the boxes there. Honestly though, I’ve never knowingly formatted anything according to the Chicago Manual of Style.
They do accept e-mail submissions, and it must of course include a covering letter, a synopsis and of course the manuscript, although they will also take questions about the submissions process.
Overall, I would say that they’re a good find, even considering the 90-day turnaround on submissions. 🙂