Unfortunately due to recording problems in Episodes 15 - 19 the audio has been lost. Episodes 15, 16, 17, and 18 can be found on the YouTube channel but the audio quality is really poor. Episode 19 is nowhere to be found.
Episode 19 has been found! After going back through my files one last time I found the missing audio files for episode 19. Editing it now, will upload shortly. In the meantime I have pulled episode 20 so that everything shows up in order.