It is nice to know you are considering a doctorate researching PCT!
I am studying a PhD in UK researching PCT, heart rate variability and exposure for spider anxiety. Although I cannot recommend you any courses in US, I can say researching PCT in areas other than cognitive or mathematical science can be quite tricky. PCT is such a new theory in non-mathematical subjects. I recommend you to find a supervisor who is open-minded and will not shut you down when you try to implement PCT in your future research. That will help a lot.
Another observation from my PhD is that it is very easy to read about PCT but it is so difficult when you start writing about it in your area. I think it could be due to the engineering influence in PCT. Some professional or academics in other areas just cannot understand PCT wordings. I recommend you search “business” or “negotiation” or other business related words in archive and it may help you to develop your research idea and propose it to your potential supervisors.
Here is the search on “business”:
All the best to your application!