This is something I really like, but never think to make at home. There was a place I used to work that made a crab dip for catering that was very similar to this, but I don't remember all the ingredients. They would make that along with the spinach and artichoke dip. I'm going to try this sometime soon.
You could probably just add crab meat to this and have a legit dip. As far as I know, crab dip isnt far from this. Let me know how this turns out for you too, I think you'll enjoy it