One Etsy shop I adore would be Ohio-based bookbinder par excellence spacedogstudios. I can't get enough of her charming, distinctive, and impeccably assembled sketchbooks and journals! All of these are hand bound; each is so artfully and thoughtfully decorated, and they are often playful as well as lovely.
If you own one, I'm sure that all the artists who see you scribbling in one of these will be green with envy! She also has other paper products like bookmarks, recipe cards, and flash card sets.