Find podcasts in a certain niche along with correct contact details for podcast

I need you to find a list of podcasts within the manufacturing, internet of things, factories, industry 4.0 niches along with the URL for the podcast, and the contact details (email) for the person most likely to control the podcast. Podcasts must have a good size audience too.

Another potential niche is:
Mass Transit

I will provide a list of the ones I have already found. I will need about 30 more. Thanks

Thanks!