Hello Marc,
You are quite right on all your suggestions. Unfortunately, to my knowledge, which is not exhaustive, there are no lineages that still teach these practices in Buddhist schools. If you know of any, I am happy to hear of them.
And while there are active users of related techniques in Hindu traditions, and some others, they all lack the Buddhist understanding of no-self and responsive naturing.
I am hoping to finish this book finished and to have it published this year.
Thank you for your helpful suggestions.