Man I really wish we could get these at some point.... check these and look at their models. If you've looked around the class hall a bit, you can see a few laying around as props and a few NPCs with them, but no way to acquire... yet.
Blood:
http://www.wowhead.com/search?q=bloodied+ebon
Frost:
http://www.wowhead.com/search?q=icy+ebon
Unholy:
http://www.wowhead.com/search?q=unholy+ebon