I got my beautiful food diary from Retro from Scratch on etsy. She also has an instagram page @retrofromscratch.
She uses old books which she converts into new ones, with the added benefit of offering a variety of inserts to choose from.
I currently have 2 books on the go; my food diary pictured below and also a shopping list book which I use everyday and features in my meal plan posts. The Food Diary has a recipe section at the back too.
They are very well made and have some of the internal pages left in place, which I think is a lovely touch. I'm sure you'll agree they are gorgeous!