Sonar X1 Professional & Session Drummer 3

Hi Folks. Im a newbie here so please excuse my ignorance. How and where do I get hold of Session Drummer 3? I am trying to create a few drum tracks for my Alesis SR-16. Session Drummer 3 has a nice pattern selection interface that will allow me to create the four patterns for each patch ( A, B and the two fills) and record them into the SR-16 in real time. I have only briefly looked at Addictive Drums that ships with X1 professional, does it have a similar pattern selection interface?
 
Edit: Thanks Folks I found it in the instrument collection :-)