Not sure I have anything he'd be interested in, unless he was doing a Colan Daredevil book (which would be awesome!). I was mostly curious about how much effort goes into finding the OA, or if books/artists are chosen on the precondition that Scott Dunbier already knows where most of the art is or can easily find it. It seems like for many artists, whose work has been sold for years and was once not terribly valuable, it would be hard to locate a majority of the pages of a run of issues. When I search CAF for pages from a particular issue, I often don't find much.
Well, I for one would love any kind of Colan book, so you might wanna get on that.
Here's an interesting article where Scott talks about putting together the New Gods book.
http://herocomplex.latimes.com/books/idws-scott-dunbier-champions-comics-artistry-with-heroic-precision/#/0
I guess if you develop relationships with the right people, whether it is artists who kept their original art (like Simonson) or dealers/collectors who have spent years tracking down work by a particular artists (like Mike Burkey and early Spider-Man), anything is possible. There's probably a lot of classic comic art that's sitting in someone's basement, basically lost. But with prices in the five or even six figures, the stuff that is out there has probably filtered down to a relatively small number of people.