This delicious, nutritious relative of the coconut is widespread in Atlantic Costa Rica. CATIE in Turrialba has a massive selection, but I don't know whether they are for sale. I bought the fruit from the San Jose market and planted the seeds in Nicaragua and it is reportedly still growing well in one of the places I planted it. The seeds take a long time to germinate, and germination is poor. Germination can supposedly be improved slightly by cracking or quickly boiling the seeds, but in my experience their was no improvement from this. In Costa Rica they are always available in many markets. In Nicaragua, they are grown near Matagalpa, but it's a good day's travel to the actual trees so don't expect to visit them on a day trip. They are sold in the Matagalpa market but only in season, and occasionally can be found in Managua.