De Lannoy's book can be found in the UK
http://www.abebooks.co.uk/servlet/Bo...tn%3Ddunkerque
Whether it's worth the £25 odd depends on how fanatical you are about the 1940 campaigns (I am !)
This sequence of pictures is all viewable on-line at the Bundesarchiv :-
http://www.bild.bundesarchiv.de/cros...h/_1258156145/
I'm not sure what the procedure is for obtaining high res copies.
Rich