Magical crops lets you craft ender seeds but it takes pearls to get started, yah.
Also http://forum.feed-the-beast.com/thr...s-but-just-started-my-world-mob-system.26680/ for Saices overworld enderman specific mob farm utilizing their looksee agro.
I've been pretty lucky with ender lily seeds in chests, currently got about 18 of them set up and a few stacks of pearls in my chests.