All else fails, try your hand at making a white skirt since white tops are easier to find in general this time o' year
My freshman year my best buddy Jen was joining Sigma Kappa and we went shopping together and could find NOTHING!!!
We went to WalMart, bought some white fabric and elastic, and I whipped out my sewing machine, took her measurements, and made a pretty good-looking skirt! She looked really nice for her initiation