Molten Core Legendary Weapon Farming

One of the things I have started to farm is Molten Core, not since it's a fun instance to box ... but since its the best chance I have to get a legendary item (or two). I'm fully aware that the weapons are of no use at level 80, but it would still be cool to own one.
Ofc the weapons I'm after are: Sulfuras, Hand of Ragnaros and Thunderfury, Blessed Blade of the Windseeker.