Update, 24 December 2016
A new pack of 44 extremely high resolution (2230 x 3400) blank book pages.
Although all pages look simular, as pages from the same book should look like, they all are unique.
Blank page pack 001
https://sibstock.ru/product-images/blank-pages-pack-001-sample.png
Downloads:
https://sibstock.ru/products/paper-blank-001.html (44 files | 205 Mb)