(And these in a downloadable format. Amazon doesn't let me right click save.)
Right-click -> save-image-as works for me on firefox.
That gets you the thumbnail version shown on the page, not the full resolution one.
Ok, right-click -> inspect element -> copy outer html, paste, get the url:
http://ecx.images-amazon.com/images/I/51xJsBCXLaL._SL500_AA280_.jpg