I'd go ahead with the print. If I was interested enough to download it, I'd be interested enough to pay for a physical copy of the thing...
I've never seen the book, never heard of it until now, but damn it I want a copy. For me electronic copies of books don't work so I'd rather have a physical copy.
Why not do a deposit gathering to see if it's still worthwhile?
(I'll drop Ralph a mail. I think there may be ways of limiting financial exposure here)