C-Products 30 round ar-15 magazine rebuild kits. I picked them up from The Custom Shop in Walworth a while ago, but they are also available on their site for the same price. I wish I had gotten them earlier for my magazines.
I ordered some rebuild kits and tacti-pulls from cproducts on 12/14 and haven't seen them yet. Their site says expect 3-5 weeks before shipping and my credit card will not be billed until the order is ready to ship.