You sound like you truly love your husband, and have already made the first steps in communicating your needs/desires to him. I would recommend taking your time and explore together. It is truly worth doing so.
I second Tasker's contribution - explore together. You may be pleasantly surprised to find that the Dom you dream of is right under your nose. It'll take patience and love, but go for it!
Working too much....and unfortunately not online as much as I'd like.