BTW, the Gambler seems to have the Epic Justice pieces at least pretty regularly, and a fair portion of the Epic Graven's and Epic Magnus's are stashed on my mules, as well.
This is with a c-lvl 56 character that has been straight legit (to the extent that using max Barter to "win" transactions and aquire more gold repeatedly is legit.)
The only two pieces of Epic Justice I'm having trouble with are the necklace and the Rifle with No Name (I have the other Rifle). I expect to score the rifle eventually (it may just be too soon for it to be in inventory), but the necklace is problematical. In general, the gambler gets in many fewer Unique jewelry items, compared to his Armor offerings, and it is tougher to identify. However, if it is extra expensive and has a socket, it is probably Unique. (If it is a necklace priced at over GP300,000 by the overcoat man, it is the Bling - trust me. <grin>)
Also, if you are shopping for weapons from the Gambler, you need to pay special attention to what the Gambler icon is, and how many requirements there are. Unlike Unique (and most Set) Armor items, which seem to universally have 3 Requirements and a socket, Unique weapons may only have 2 requirements, or even only one. They all seem to have a socket, though, and the icons seem to be fairly distinctive from anything except the actual type of weapon that uses that icon ordinarily.