Adding additional channels.

I just switched from local cable ( Armstrong ) to DirecTV. 

With the Preferred Choice package, I am missing a couple channels that I use to have and enjoy on the old local cable system.

The one channel I miss the most is FX.

Can I somehow add this ONE channel to my Preferred Choice package  for a SMALL additional amount ?

OR do I need to upgrade to another package at a LARGER monthly fee ?