This is from Sweet Marias (hope thats ok, mods?)
Now, what is Mokha? Al Mokha (Al-Mahka) is the port city that Yemeni coffee ships from! It has nothing to do with chocolate. Why is the coffee called Mokha? Because in the coffee trade it was too complicated to name all the little sub-regions where the coffee is actually grown, even though they do produce notably different coffees in terms of the cup. Many of the dry-process Ethiopian coffees will also call themselves Moka: Moka Harar etc. ...I believe to associate themselves with the taste profile they share with Yemens. How the heck do you spell Mokha? Well, it is spelled usually Mocca or Mocha or Moka ...but in fact the most correct spelling is the one you will never see: Al-Mahka, which is the truest to Arabic spelling
So, a Yemeni or dry-processed Ethiopian should give you the taste youre after.