Hi NeedChange,
I'm sorry you're struggling. You're right, nothing easy about breaking this addiction, might be the hardest thing you've ever done.
Besides the mental obsession, it's important to realize it's an ingrain habit. Breaking these chains requires a break from the normal. That includes reaching out before you take the action, or do something (anything) other than the thing you always do. Buying NA beer is just the type thing that keeps you doing the same thing, feeding the habit/obsession. Try something completely different. When I first got sober, I would do anything (walking, browsing the shopping mall, or perusing the bookstore) besides going home.
All the best,
Methodman