Wow, I have watched that movie, he appeared to be so amazing and cool. As to your question ,the type of sunglasses he wears in the movie is called, large aviator sunglasses, with black lenses, what a real hit! So, there are plenty of places where you can find those sunglasses, maybe you should take a look at Walmart or Max Mart, where a lot of that sunglasses are on offer. I suggest that you take note of the particular sunglasses and head to the stores afterwards.
The sunglasses that Washington wears in the book of eli is men's oakley inmate Race wear sunglasses. The Oakley Inmate is a part of Oakley's 2008 Lifestyle series, which is also cool for casual wear . You can find a pair of the Oakley Inmate sunglasses at Amazon.com for about $150.