Can you share what companies you have your E&O with?
My broker runs two offices. One is a RE/MAX office and another is an independent office that he owns and runs separately. The latter is the one I "work" for.
He uses the same E&O company for both offices. They are Capital Professional Insurance Managers Inc and can be reached at 301-966-6500. It is a $1,000,000 policy. Since he provides the E&O, I have no idea as to the cost. Good luck!