Where are you located? Many of the NPC sororities have alumnae initiate programs. All you would need to do is contact the national office for those that offer (I have a fairly complete list of those that have such a program) and they can get you in contact with the local alum chapter. The website for the National Panhellenic Council is
www.npcwomen.org
Good luck and if I can help out in anyway, let me know!
Sarah
Alpha Omicron Pi
Beta Gamma '00 (alumna initiate)
Detroit North Suburban Alumnae Chapter