Hi Jules,
There are CA meetings on every day all over the place – if you look up CA online there’s lists of them. That’s his best chance of recovery but it won’t work unless he’s willing to go, ideally every day, and willing to engage with the recovery process. Some of the meetings are open so you could go with him as well. The problem is we can’t force them into recovery, they have to want it themselves. It’s frustrating and heartbreaking to watch them destroy themselves but there’s not much else you can do. Try and encourage him to go to a meeting x