Edit to add: Actually I just found this resource which you might find helpful https://dailycoffeenews.com/2018/08/15/a-practical-water-gui...
I’m going to brew some with this profile and see if I can taste the change, and if not I’m just sticking with my filtered tap water because it’s honestly pretty darn close. Just needs the chloramine taken out.
Assuming you mean the "notify when back in stock" on that website, unfortunately the book is now out of print.
If anyone else has an alternative source for it, I would be interested in reading it, and it seems like it would make a great gift for my coffee-geek friends.