Oh yes he is an escape artist I am really glad you said something. Is this one like what you are talking about?
I was talking about the ones like lv4dogs linked to in the Foster & Smith web page. I didn't see any on the Walmart webpage, but I believe they still sell them in the store. But, you can find them anywhere. I'd just make sure it's sturdy without pins poking out and that the door cannot be pried or in anyway opened from the inside. Good luck!