May I suggest...
...letting go of the need to get it? Getting it won't change a damn thing. He will still be fully responsible for his recovery (or lack thereof), and you will still be powerless over alcohol.
Personally, I believe one of the biggest mistakes that can be made is putting so much energy into trying to understand that which cannot be understood or is none of our business. If that same amount of energy was put into our own recovery great things would happen.
Take care, take what you want, and leave the rest.
Cyranoak