I just tried the upgrade finder. I currently am using 171 pvp 2 handed weapon. When I check the upgrade finder for any upgrades for the raid on any difficulty nothing shows up for weapons. All other slots though show me upgrades.
I will be adding the raid weapons in the next update – because they are from tokens and not actual drops (that show up in the dungeon journal), we had to do all the drop locations manually. I have it pretty much done though, should be in tonight or tomorrow.