Recently, Barbara Hauser wrote on a letterpress list I read
Can anyone suggest a text- or book-weight cotton paper similar to Hahnemühle Bugra, which is a mould-made 130 gsm laid paper and comes in a creamy white color. I’m looking for something to be dampened and printed with multiple passes using a 10-point rather delicate typeface. I’ve ordered some of the Hahnemühle to experiment with, but I’d prefer cotton. The Somerset Text Laid seems to have been discontinued (why?), and the Zerkall Book Laid is not quite as heavy as I’d like and is not 100% cotton.
She also posted the question on Briar Press. She took the suggestions (there are quite a few on the Briar Press discussion) and summarized them in the following table (bigger version on her flickr page.) She mentions a really nice Paper Comparison Chart from Daniel Smith that lists all sorts of papers, not just printing paper. (You can see Barbara’s letterpress work on her flickr photostream.)