There are a lot of AI narrator services you can use to create and record custom podcast. There is one called narrationbox which I specially use to create Audio Books from ebooks. You can use it to record custom podcasts as well.
I’m also seeing a bit of what look like private podcasts taking off. It’s probably a matter of time at this point.
Podbean - enterprise podcasts - https://www.podbean.com/enterprise/enterprise-podcast-soluti...