Punkin, If you don't say anything more about the items, your h will tell on himself. They all tend to have loose lips and love to talk about how they screwed you over. Just bide your time...
When I discovered things missing, I made a list, wrote down what we had paid for the items and then split the total amount in half. When it came time for settlement, my lawyer presented him the bill to buy me out of my half of the items. Some will say that this is splitting hairs, but what my xh took totaled to a hefty amount.
I wouldn't respond to his email. I suspect it's his way of wanting to see what your reaction is to the "theft". They are so transparent about their actions. I wouldn't address it w/him for now.
BTW, don't you find it odd that you discovered the "missing" items after your trip to New Orleans? Again, another way of getting back at you for leaving and having some fun. Some mlcers do this to the lbs.
I hope that you have a pleasant weekend. Stay as quiet as a church mouse...the answers will land in your lap!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.