Apologize for the super late reply. Yes I did find a book:
However, it may not be perfect. I used it as a starting point and then adapted it so I could write a bit quicker and that felt more natural, so a good starting point.
Write Now: The Getty-Dubay Program for Handwriting Success https://www.amazon.com/dp/0964921510/ref=cm_sw_r_cp_api_glc_fabc_1SY9FbDNCB63W they also have an app version, but I can’t speak to how good it is since I used the book.