I unlocked Renown 24 with Assembly of the Deeps but never received the quest from the quartermaster for the “Crest of the Kobolds,” a.k.a. Enchanted Runed Harbinger Crest. Oddly, this only seems to be a problem on the character on which I actually received the reputation gain to unlock Renown 24. On my other characters, the quest with the crest is available at the quartermaster. It’s also worth noting that, like with pretty much all Assembly renown rewards, the description in-game is incorrect and says to visit the quartermaster in Gundargaz, when really the rewards are from the quartermaster in Dornogal who is standing next to the Council quartermaster. I checked both and neither of them will give me the crest. I checked all my bags and mail and it was not automatically placed in there either.
Can’t you get them from both NPCs?
Maybe. I seem to remember looking for something at the one in Gundargaz and having to go to Dornogal instead, but could be wrong. Still, I never received the quest for this enchanted crest from either of them.
Yes. I believe Blizzard originally intended to place renown NPCs for all four main factions in Foundation Hall after completion of the main campaign, but the implementation went incomplete.