You can get a printed copy of the book at lulu.com. Lulu sometimes has special offers for discounts or free shipping; check the main Lulu page before you order. If you decided to order a physical copy of the book, you will want to order one of the Early Transcendentals versions. Also, note that the physical textbook may differ slightly from the online version posted above as we occasionally make updates to the NAU version of the book.
If you would like to have a commercial calculus book, we recommend any edition of Calculus, Early Transcendentals by Rogawski et al.