Due to a technical mishap (aka interference from The British Government), the casefile audio files are down for a few days. Everything should be put right again by Dec. 1st, 2017. (Or else Mycroft will have a very uncomfortable Christmas Dinner.)
All of the audio posted here can still be heard within the main episodes. From any given file, click through to the Three Patch Podcast site and use the timestamps to find what you were looking for within the longer audio files.