Don't make the same mistakes I did -
I reccommend a pouch that extends beyond the out side dimension of the forks and that it be made of some thick and rigid leather. Mine does not meet either of the suggested criteria and its as limp as a wet noodle and sags in the middle (between the forks - front to back. I am continually adding little brackets and stiffeners, but they need re-arranged with each new sag.
One final suggestion - Mount it in such a way as to keep it off the forks - the continued movement will mar the forks