It might be worth trying to get a cut from the Clinique sales. We just did a thing with these 2 Mary Kay ladies. They gave us 10% (or something like that) to go towards our philanthropy. One girl even won a trip to the Bahamas, but that might be a stretch.
Maybe they'd be willing to throw in some cash if they knew it was going to charity instead of maybe just to the sorority.
BTW, made my final decision today. I will definitely be starting grad school at UCSC in the fall. Woo hoo!!