Here is a the best "small carrier" I could find.  My Sophie is only 2 lbs. and she fits in it really nicely.  The other ones I have (I have 5 altogether...yikes!  

  ) are wayyyy too big right now.  The company was really great too.  Very friendly and very quick shipping!  (Reasonably priced too!)  
 www.4dogsncats.com/index.html
   www.4dogsncats.com/index.html