Elixir of the Mongoose and Greater Nature Protection Potion

Have the recipes for Greater Nature Protection Potion and the recipe for Elixir of the Mongoose been removed from the loot tables? i have farmed over 250 of each of the mobs that they are said to drop from and still no luck. they are said to have a 1.9% drop chance and a 4% drop chance respectively.

Edit: in TBC it appears they have upped the drop rate to 6%. still no drops however

Edit #2: 550 kills for Greater Nature Protection Potion and still no drop