I am not a deep WWII Desert War expert but I don't believe that the AK actually made it into Egypt, except for a few spies and a few recon groups. Rommel was stopped a couple of times by Monty and the EA.
But I poised a question in the Forum about historical accuracy vs. artistic license a while ago. Most agree that a great looking diorama can have a few "historical" flaws.
So having some of the AE pieces with the K&C EA figures would be fantastic and correct. Having them with the AK figures would make a incredible display but (who knows) about the accuracy.
You can always say that you have a secret document that shows....