Soror,
Well you're not going to find too many connections to Gamma Sig on the National Alpha Phi Omega site...25/52 isn't officially recognized by either organization. That's the short and sweet story anyway.
I have some places online you can visit for some peri:
The Greekshop:
The Greekshop. This place carries the Gamma Sig crest, and it's the ONLY place so far. They do great work, I have gotten things from there before.
Ujamma's:
Ujamma's. They are located in Tallahassee and they also have the bomb t-shirts. We have a frat brother who works there as well.
The simplest thing to do is do a search for Greek Para and a lot of different sites will come up. If you're coming to the 25/52 Cookout this weekend, we will have some vendors there as well.
Hope this helped soror!
Wee-Oop