Gather the materials Furen Longbeard requires, and bring them to him in Stormwind.
So I gave you a nice shield, but we don't have to stop there. I know the secrets to make extremely hard mail armor. It's not easy and it takes very rare materials, but if you're willing to do the legwork then I'll make a piece for you.
What do you say, [player]? If you're up for the challenge, then I'll give you a list of what to get and where to get them.