I've made a few of these little booklets using my own marbled paper. And I have an Etsy shop where this one is available for sale right now. I expect to have a few more up there soon.
Blank paper notebook, hand-marbled paper cover with stamp, hand-stiched with beaded tassel. 5.75 inches high x 4.25 inches wide. About 16 pages. Oh, and there's a secret map inside!