I've tried to fetch this podcast, but it seems to be somehow unavailable or defunct...

Wow, you're right. Their site is gone and it's not downloading properly on itunes. Wonder if its out there somewhere.

They stopped recording them a while ago and said they had recorded all they had to say on the topic, but shame its been taken down.

Take the podcast down then human nature being what it is people get interested in knowing what they've missed. This is a good technique.