If the sole issue is the "urge" to drink, the chinese herb Kudzu has been used for 100's of years in china to deal with urges to drink and for long term treatment of alcoholism. It has been studied by western scientists and their studies confirm it does reduce the "urge" to drink.
Sites that sell it on the net state "The one step (kudzu) that you should take before the 'Twelve Steps'", I don't know about that but it has worked for me. T