For the silk:
http://wow.allakhazam.com/db/item.html?witem=4306&locale=enUS;source=live
just mouse over mobs that drop for map locaqtion
For the wool:
http://wow.allakhazam.com/db/item.html?witem=2592&locale=enUS;source=live
mouse over again..
in the future you can find this yourself, allakhazam is very easy to use
just typ the thing you search, need or whatever in de white space beneath the word "search" (on the left of this screen)
You can also do this with Mobs, quests and everything else you want to know something about this...
Good luck