This YouTube video from 2010 shows an interview with paper maker Iwano Ichibei. This is the paper that David Bull and many other professional printmakers use and is considered the best paper for traditional Japanese printmaking.
There is a website link here to the Takipaper website: http://www.takipaper.jp/user_data/washi-shokunin-echizen-ii_01.php
It has more photos of Iwano-san. It is only in Japanese but it looks like you would be able to order paper from them.
Baren-suji is the online newsletter of [Baren]; The International Forum for Woodblock Printmaking. The official internet site of [Baren] is http://barenforum.org Baren-suji are the marks left by the baren when printing. Similarly, this newsletter assumes the role of recording the marks left by the woodblock printmakers that constitute [Baren].
