A while ago I was just browsing around on eBay and came across these:
http://cgi.ebay.com/High-Quality-Hex...d=p3911.c0.m14
Since the price was really low, I decided to for it. I have been using them for a couple of months now and they are holding up really well.
I know this is not one of the famous brands or anything, but I thought I would share this information.