If you personally know any women who are members of sororities, ask them for recommendations first. Recs from a person who knows you are preferable than those from someone who doesn't.
http://www.npcwomen.org/alumnae-panh...directory.aspx
Look through the above link for the alum panhellenic in the city & state nearest you - click on it and they can point you in the right direction. If there isn't a link just email the address at the top of the list and let them know you're trying to obtain recs.
Good luck!
