How to add the TF trim plus transormation into the toolbox componenet in SSIS

Hi

I'm using SSIS 2012 and i would like to use the 'TF trim plus transormation' which is in the "task factory data flow" topic.

This topic doesn't appear in my toolbox area and i'm not able to see where i can find it. 

i'd like to get some help

Thanks

Yaron