Usually on Black Friday they are on sale at a lot of department stores. You can even find them at Khols. I remember seeing them there last year. Not sure how much you are trying to spend on each of them, but the ones that were at Khols were around $18 and had real diamonds.
Needing that many you may be able to ask a vendor for a bulk discount...one of my favorite gals to work with for custom orders is Leslie you can find her here:
http://www.etsy.com/shop/Leslie23