The podcast service Ralph used didn't delete the files after he cancelled it. I believe this is how Gator was able to recover the lost audio.
You can obtain a list of urls from the latest archive of the rss feed here (broken but still usable archive on archive.md). With a modification to the url, you can still access the audio. For example, take
https://media.zencast.fm/killstream/9fed666b-921d-4d5b-b261-f91e70795866.mp3?source=feed
and change it to
https://podcdn.zencast.fm/download/media/2983/9fed666b-921d-4d5b-b261-f91e70795866.mp3
Attached is a copy of the rss, a list of links to each audio file, and the data for each show to make it easier to find a specific show. There are a few missing because I know he had at least up to 480 on there. Perhaps the rss feed is still live, but I could not find it.