The rewards from
Slaggak's Bounty appear to be reversed. According to the quest text, turning in 4x Shard Wurm Fangs should reward a pair of Cerulean Greaves and 4x Ice Wyvern Stinger should reward Cerulean Vambraces. Currently on Green, fangs reward the vambraces and stingers reward the greaves. I found a
Feb 2001 comment suggesting the quest worked as expected.