On a tip from a guy on another forum, I upgraded my Tracker17 grip with a RB grip from Taurus.  Cost me $25 and improved the handling of the gun amazingly.  Screw hole doesn't line up at the bottom of the grip but it can be made to.   Rubber is a tight enough fit for me on a rimfire.
Here are some b4 and after pics with my big mit for a reference:
 
 
