Here's something I didn't see on this thread. I was asked on my build thread where I got my parts to make my own cables.
You can find all sorts of tools and connectors at Frozen CPU. As for deals... I don't know. Have not found any other place for parts like these.
http://www.frozencpu.com/cat/l1/g51/Connectors.html?id=xpBVkfXw