I have been working with the book angle and found that it assists my reading tremendously. I got tired of propping mine up with a Kleenex box and I didn't want to try Margaret's innovative plunger bookstand, so I started looking for stands.
I could not find the specific ones mentioned in this stream of email. I have purchased 3 bookstands each with its own advantages. The first I tried was an inexpensive metal frame-like support structure, costs about $5. Then I went to a plastic one by Fellowes, costs around $15 (both of these I got at my college bookstore. The absolute best I've found so far is called the book gem; it is the most flexible and compact. If anyone is interested you can see more about it at http://www.bookgem.com/. It was $20 plus shipping but well worth it.