Revenge is a dish best served cold, and I know you've had a few days mulling this over, as I was in chat when you broke this news to us...
I would be tempted to write to his congregation elders, but keep it professional and reasonable, rather than emotional. They are possibly cold-fishes (regarding any non-JW - remember you are sub-human in their eyes) anyhow, and so may respond to this better. You will only really get one shot at this. Any further correspondance will lose impact. Feel free to PM, if you'd like me to look over a draft.
You should labour the point that you never interfered with his worship (AKA Meeting attendance and Field Ministry), and fulfilled your wifely duties ().
You should also use 1 Tim.5:8, to show that he is not playing the game:
"Certainly if anyone does not provide for those who are his own, and especially for those who are members of his household, he has disowned the faith and is worse that a person without faith" (NWT).
It won't win him back, and I suspect that you may no longer want that, but it may give him what he deserves (by their own rules, which he has willingly re-accepted).
Of course it may all backfire wonderfully, in that he may get DF'ed again, break free from the borg, and live happily ever after...
Meanwhile, ((((WG))))
Edited to add: Yeru's point is good, too. He's condemned himself to celibacy.