I would highly recommend Dan at Chiclids of the americas as I have done business with him before and I very pleased. Jeff Rapps at Tangledup incichlids is another importer. You should get a hold of them and ask what they have and what your looking for. PS they dont always keep their stock lists up dated. These importers are your best chance for WILD fish.
My two cents the bigger the tank the better I am of the opinion that a minimum tank size is 220 for an adult pair. These guys seem calmer with more room= larger territory. The nice thing is these fish are not fast growers so you can start them off in a smaller tank. I mean in my experience it takes 5 years for a male to reach 18 inches.
Good luck