http://www.i-nique.com/model.asp/cn=4/c=561
That eco-nique one is an i-nique cover.
I had the Saddleback one for my PRS-600, and it was so good I pre-ordered the PRS-650 one as soon as my 650 arrived. I've now received the cover and it's had a couple of slight upgrades from the first one. It now has a magnetic catch rather than an old style one, and there is now a small velcro flap to ensure the reader can't slide out (it did not slide out of my 600).
The reason why I like these covers so much is because they have a support on the back which makes reading the book anywhere far easier.
It is expensive though...
I-nique's website, I believe, was designed by a 13 year old. The young web designer was tasked with producing the site, always keeping in mind the watchword "cool". The end result is a website that really just isn't very good for looking at the products.
I've taken some pictures of my 650 in the Tuff-Luv Saddleback case, anyone want to see em?