Dear Butterfly22~
Welcome here to the forum, a good place to get ideas and support.
If you husband knows he needs support that is a good start. If talking it over with him and this not leading to him seeking help both for suicide and alcohol is there anyone else who might have more luck persuading him? Maybe someone he respects from work, or loves such as a family member?
One thing you might try is a sideways approach. His talk of suicide would have been extremely worrying, and not being able to do anything abut it extremely stressful for you
As a result see if you can interest him in a Safety Plan. This is something which is really excellent to reach for when one feels overwhelmed and thinks of taking one's life.
I use one called Beyond Now, which is a free smartphone app and has an awful lot of potential, allowing for a lot more things than you might expect., not just crisis numbers, though it can make them just a button press to use.
https://www.beyondblue.org.au/get-support/beyondnow-suicide-safety-planning
Ideally two people fill it out together well in advance of any distress. When I tried on my own I was hopeless as one of the most imortant features is listing specific things that have made one feel better, given a lift -or in my case even a laugh and then using htem. I found it impossible to remember these and relied on my partner who was able to recall all sorts of things I'd liked. Now I have Youtube comedians and music, movies, a cafe to visit, someone to chat with , books and more
Coming together to build this helps both people and can draw them closer.
While it has spaces to put in crisis services for suicide it can also hold spaces where you could put Alcohol and Drug organizations that can help. It will at least provide a talking point between the two of you.
I'd suggest you contact our Help Line on 1300 22 4636 to find Alcohol services in your area, or ones that offer 24 hour support, then include those in the listing
You may wish to contact them yourself to see what advice they may have.
Do you have any support yourself? It makes a lot of difference ot have someone you can talk with who understands and cares. Trying to deal with this all by yourself is very hard.
Please come back and tell us how you get on,
Croix