@hgregory- Good morning Greg. I must warn you that stem cell treatments for COPD is very new and that there really only trials being offered. It's important to find legitimate information about the trials and those that are just scams. There are a lot of bogus clinics offering all sorts of promises that are just not science based.
https://www.webmd.com/lung/copd/features/copd-new-treatments - This will give you some understanding of your interest.
I would recommend looking into this: https://www.mayo.edu/research/centers-programs/center-regenerative-medicine/patient-care