Pyrrhos got his elephants from Antiochos I -- or at least that is what I understand.

We originally gave Epeiros the ability to recruit elephants because of the thought of a breeding being possible. In having done more research on elephants in general, I can safely say that a viable breeding population would be impossible to maintain -- even in modern zoos it is impossible. In light of that, what we do in EB2 will be much different.