Perhaps we can have here a collection of nurseries to buy Endemic plants and other rare plants from.
Please feel free to add more.
Nursery of Ruk Rakaganno (http://www.sacredcat.org/rukrakaganno/
Project: Nursery of Sri Lankan Trees
"In November 2004, Ruk Rakaganno set up its own nursery of trees (primarily mainly Sri Lankan indigenous endemic trees) in the premises of the Anglican Cathedral in Colombo. Over 80 species of trees have been collected and the collection is constantly added to. These include timber, ornamental, flowering, fruit, and medicinal trees, available for purchase by interested persons, for landscaping of their own properties."