First off, I would contact those on GC and get to know each and every Soroity better by checking their web site and asking questions of GC Members.
A good question to ask yourself, is why someone would want to give a Rec, when they do not know you?
Therefore, your first priority is to get to know people. Joing a Greek Organizatin is not to be taken Lightly! This is a commentment for life!
I have been doing it longer than most on GC! 40 Years and still beleive in what Being a Greek Is!