There is Moshe Cohen of WeDoSeforim.com. He helps busy people create their books; transcribing from audio, proofreading, editing, illustrating, typesetting, publishing, even distribution. They can also prepare custom Siddurim, Benchers, and so on.
Book publishing: when you need the help, you really need it.
I have not used his services myself (yet), but he sounds like a guy who goes the extra mile. Check him out.