Sapien Medicine uploaded 2 great audios to Teespring recently.
Some people live in regions that are not supported by Teespring. If you want to order an audio from Teespring, but you don’t have a supported address, this site works well for generating a fake address that is accepted by the system. Since the audios are digital downloads, nothing is shipped to you anyway.
Edit: I see now that @Zen beat me to it in another post!