https://sub.rehab may be able to provide you some direction in finding replacements

There's a stopdrinking one, but unfortunately it's on lemmy.world, and we're not federated with them.

I like the idea of an addiction support community, and as a recovered addict/alcoholic, I'd be willing to help moderate such a community.

There is a community for addiction on raddle, but that's not part of the fediverse.