"Casino Royale" Penguin Covers Infinitum ?

I received three copies of "Casino Royale" in the mail today.  All three books were published by Penguin and have slight cover variations.

 

I do already have the book on the left which is part of the Richie Fahey US Retro Centenary Series, however the other two are new to my collection.  Both are movie tie-ins, one stating "Soon to be a major motion picture" and the other "Now a major motion picture".  Until I found them on the web I'd never seen these two covers before.

The addition of these movie tie-ins to the PizGloria website brings the number of copies of this cover with small variations to six.  Five were published by Penguin in the US and the other in the UK.  So while using the word "infinitum" in the heading of this blog entry might be a slight exaggeration, the question is, how many more of these covers are still out there?  A quick Google search brings up the two cover images below that I've always categorised as prototypes.  Now I'm wondering if they actually exist?