So finally here are the locations of the Artifacts for this Barbarian Quest pack, for anyone who needs it. Obviously if I missed anything, let me know!
*Possible Spoilers*
Snowshoes of Speed - Quest 4
Ring of Warmth - Quest 5
Spell Scrolls (Random Draw): Quests 5, 6, 8, 9 & 10
Amulet of the North - Quest 7
And yes, as many have pointed out, the Armband of Ice is never actually found in any of the official quests!
(but in 2022, Avalon Hill released a free solo quest intended as a prelude to the pack, entitled "Into the Northlands" where this artifact is found).
Into the Northlands also adds brand new Artifacts that didn't exist in the original 1992 edition (Warhorn of Command, Ice Queen's Spear, Cold Iron Plate, Spiked Shield)... and there are only general guidelines given, that if Zargon wishes, they can be added to the campaign, probably heavily guarded. But they are otherwise completely optional and have no physical cards (the PDF gives you guides to print them yourself).
Other Artifact Locations:
Game SystemReturn of the Witch LordKellar's KeepElf Quest PackMythic Tier quest booksRise of the Dread MoonJungles of DelthrakFirst Light