To install Jon Kabat-Zinn Series 1, you can go to your Play store history and install it from there. It is available for all customers who paid for the app, Jon Kabat-Zinn Series 2 and Series 3 are still suspended by Google.

Go to Play Store, click on your circle in the corner:

Then click on manage apps and device and click on the manage button filter “Not installed”

and then install the Jon Kabat-Zinn Series 1 app.