Can't Buy Warlock Quest Items from Vendor NPC Gorzeeki Wildeyes

Gorzeeki Wildeyes was an NPC vendor for the Dreadsteed of Xoroth questline from the original World of Warcraft. The questline was removed in Cataclysm, but warlocks who had completed the questline were still able to buy the quest items from the vendor until that ability was removed with Mists of Pandara. Customer Support does not assist with this issue for modern World of Warcraft characters.