For anyone else who wants to do it.. here's how its done, although its not guaranteed to work if you try to make this event make one mob drop more than one item.
http://pastebin.com/K5sHCzU3
just swap out my items for yours, and my mobs for yours
when ever i try to see a specifc item is in hand it dosent work...
ive given up hope on this... maybe someone else can see what i did wrong..
the part that needs to find the specifc item is line 19 (tried every way i could think of and got various NPE's and found waldo..)
http://pastebin.com/9Qdj9cB9
what i have that half works