I did that with my AS and he walked out of rehab. I found that they play the game to get us to let down our guard. Then were right back in the same situation. The fact is if he wants help he will find it.
If we do all the work we are just doing it to make ourselves feel better, that at least we are doing something to help. But we are just prolonging the time it takes for them to decide they don't want that kind of a life. I found that they always turned back to me when they couldn't afford or find the drugs.
You can give him a list of place to find help but you can't make him want it.