[Pharo-project] some little aif files

Hi guys the sound system requires to have some sounds loaded in the sound library. Befre it was croak, swirl…. Now since the files used to create the objects are probably gone from age, I would like to find some little aif files that we can load in the system. does anybody have an idea of where I can find such aif free files? I could serialize the objects from the squeak image but I do not know if this is a good idea. Stef