Not able to craft Hellfire amulet without ROS expansion??

I realised that the hellfire amulet quest could not be completed while I am not having the reaper of soul expansion... :(

After beating the 3 sets of Uber boss (4th one would only be available with reapers of souls), I received materials instead of organs.. but the jewel crafter requires Organs...

Is there anyway to work around this ?

I am not planning to get Reaper of Souls expansion so if someone knows a work around to get the hellfire amulet kindly leave a comment.

Have been farming keywarden and uber bosses, seems to be good, gotten 2 legendary in less then 1/2hr just on runs at torment 3.