honestly, there isnt much. you can try running auchenai crypts for the felsteel gloves recipe, which is a nice one to use to get to 375, but its a fairly rare drop. thatll be the MO for lots of stuff post-360; rare BoP smithing drop, epic world BoE drop that uses primal nether, or rep rewards from aldor/scryer.
you can also try the felsteel shield spikes from thrallmar/honor hold rep, but those take exalted to learn :(. smithing at 360+ is a very difficult path to follow.