IIRC, there is a blurb in the 2013 book about coffee becoming the new cocaine and export of coffee beans being one of the few highly profitable ventures still going from South America. Coffee is grown in 70 countries, so if there is any contact in the area with contacts who travel around Africa, Arabia, Central or South America, or Asia, it will likely include coffee. Even the artificial stuff will likely be be around (such as Postum was in the US during WWII).
Also, even in times of famine, beer production will likely be around. It's a high caloric beverage (like drinking your bread) and much less likely to infect the drinker with waterborne diseases. If there's bread, then there is likely beer.
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