Amazon.com : Portage Pocket Notebook Cover - Protect Your Notepad with a Durable PU Leather Holder, Fits All 3.75" x 6" Portage Notebooks, Refillable, Provides Extra Stability and Comes with Pen Holder :
Making a Purple Leather Reporter's Notebook - YouTube
Field Notes Front Page Reporter's Notebook Cover - Galen Leather
Leather Reporter's Notebook Cover 4" X 8" | Portage Notebooks
Leather Pocket Notebook Cover 3.75" X 6" | Portage Notebooks