Archive .org has an incredible amount of material in the public domain so that you can download and use it or listen to it freely on the internet. Most of it is downloadable in MP3 format. There is a lot of material for French which are classics and I’ll start you off here with the Mystères de Paris . I have downloaded some fables, poetry and some stories to listen to. The shorter things are for my students and the longer things for me! That’s fair. The good thing is there are print copies of the spoken word which is so helpful for preparing class materials.