Legion DisplayID's that work

Topic. I don't know if you guys had the same issue, but almost everytime, the displayid's of an npc or gameobject are not correct. Now that we have a few Legion Repacks available i tried to morph my chars into some of the new npc's, yet, every displayid i tried was wrong. Even the ingame modelviwer addon didn't work. So my question/request, is there a way to get the 100% correct displayid's of npcs/gameobjects? Or does someone of you have a list of id codes that work as intended? Would really appreciate it.

:)

Finally got a few displayID's that work.

Night Elf Male DH Havoc Meta - 65312
Night Elf Male DH Vengeance Meta - 65309