Under the heading "poetry books", Lulu offers a hardcover format in a size that sound more like what you want. Also, this looks more like it'd be set up with graphic design in mind, rather than just traditional text. I'd be shocked if this doesn't solve your problem!
I'd considered something like this just to have a "the artwork of..." book of my some of my art, but figured at this point in time it just wasn't wort the effort.