On the Fippy Darkpaw (Progression Server) currently this quest is active again. Currently we are on the Kunark expansion so the old Grobb is back in and the trolls start there. You can turn this in to Treskar who is the sk guildmaster right beside the one new troll sks spawn beside (Hukulk) at loc 491, -903 and recieve Froglok Skin Mask as the quest reward.
To see this quest just hail Treskar and say:
I was sent by Hukulk
What secret mission
Quest Reward is:
Froglok Skin Mask
Face Slot Item
2 AC
0.4 Weight
2 Intel
2 Dex