I was looking around online for what companies make badges for fraternities and sororities and I found this site
www.vintagefraternitypins.com. As the name suggests, they sell old fraternity and sorority pins. They have a pulldown menu for fraternities and sororities, so you can see if your GLO has any pins for sale and try to buy them. On their FAQ page they never say how they get those pins. I thought I'd let people on GC know about it so they could be alerted and maybe do something about it if they have a group such as Kappa's
Keepers of the Key.