Just in case you don �t come accoss a listening that suits you, have you considered creating the listening file yourself? Using a speaking avatar to do so (a Voki) is pretty simple and it helps you adapt the level and contents of the istening exercise to your specific audience.
It just takes registering in

www. voki.com

and then you can create and customize the speaking avatar you wish (be it a person, an animal) and then voice it (i.e., give it a voice - recording a voice, uploading an audio file you already have or just typing the text you to be heard); accents can also be chosen.