Hi Ivy,
That is so sweet that you want to get your friend SAI stuff! Unfortunately, SAI gear is notoriously hard to find. We don't have any of the cute ready-made stuff that the NPC and NPHC sororities have. If there's a greek store near you, I would recommend getting something custom made. Other than that, our colors are red and white, and our flower is the red rose. Our official boutique is
here. Good luck, and let us know what you end up getting!