[timberwolf9999]

It's kinda pricey, but here's a couple:

http://www.venturamunitions.com/categories/rifle/223-rem-1-ammo-for-sale.html

http://www.ammoforsale.com/.223-ammo-for-sale

Maybe keep an eye on it and see if it comes down in price. I have to admit I haven't really checked in a couple of days. Been too busy, but I do need to. If I find any others I'll post more.