Is your husband getting any therapy to follow up his rehab?
Does your husband come here? I'm not asking who he is (don't want to know) but he might find this forum useful. And the thing that's nice about this instead of say an AA meeting is that there is almost always someone around.
Plus, at least to me, it seems a lot more open minded and accepting then an AA program. It might at least be a good place for him to visit.