Doing the litho book would be right up the alley of Taschen - it's a German publishing house, which specializes in exclusive, limited edition printed books with a hefty price tag.
For example, here's their book on Alex Steinweiss (inventor of modern album cover) with the collection of his works
Edition of 1500, 1000 bucks each
I bet they could sell at least as many copies of the litho collection for at least as much per book.
That's easy money fo