The parts are found underwater around ( 237, -101, -1570 ) /waypoint 237, -101, -1570 in the goblin sea to the far north near Permafrost.
Note: There is no longer a minimum of 190+ gathering skill, but you may get many "failed to gather anything" messages. If you are below the minimum, gathering these parts will update the gathering skill
The grave is at ( -452, 16, 73 ) /waypoint -452, 16, 73 in the Loping Plains. Inspect the grave, then follow the ghost to a bandit camp at ( -451, -18, -145 ) /waypoint -451, -18, -145 where you need to kill a (non-agro) a grave robbing bandit, level 65^. The bandit spawns when you summon and hail the ghost and depops if not killed.
He will spawn as an NPC within the Smokehorn Basin in the Steamfont Mountains near the other named at ( -880, 60, 1531 ) /waypoint -880, 60, 1531. Speak to him and he will attack as a 65^, kill him for the update.