Hiya David , this is no way to live and i really feel for you . Having a nasty neighbour is distressing.
Why not go to your doc , get a sick letter stating nerves , anxiety etc since you have moved here and it would be in your best interest to move and alleviate the situation.
You don't need this , especially whilst trying to stay sober ...its DEFINATELY a trigger.
Good luck , the only other thing i suggest is don't speak , don't look in their direction , treat them as though they don't exist and keep moving on with your life . Don't answer any snide comments , they will get bored eventually ....