There is no set place, they are random. And they might not show up in a single playthrough. You might have to play again to find the items.
#Delete
sick pine
sick pine
I had to play 3 times to find 1 piece of gear, and it was a random loot drop
granite karma
First Civilization. Your pic is of Crown & Waistband. Only in Atlantis * . 3 colors avail. 6 pieces: Crown Hood Breastplate Bracers Waistband Greaves. Grinding/low drop % luck required to get all 3 colors full set each. (NG+2 Xbox, NG+4 PC) * Also another First Civ set in Elysium but each piece has its own name, quests related. Isu Commanders set, Altantis only, 3 colors, full set also low drop %. Dont' worry about purple drops as transmog system to best actual armor using. All blacksmiths incl Forge of Atlantis smith update inventory every 2 player level ups. After visiting any/all blacksmith first time, next visit after 2 level ups, he has 2 sets of inv. View first inventory, quit out of smith, go back in, will be another inv selection. Full or Quick save before blacksmith, view 2 inv sets, reload save, ...
sick pine
Nice explanation!