Where to get narrow bars

I guess there is a massive difference between Chris Hoy saying 'you see the difference between a sprint with elbows out, and elbows in, and think I've got to work on that', and actually being able to develop that power and deliver it to the wheel in the first place!

But when all you do is squat massive weights and you have no idea how to pedal a bike then someone telling you that spending £??? on handlebars will make you a faster sprinter is a dream come true!