I have kept European herps for about thirty five years and have never seen them available ,even before the days of Veiled and Panther Chameleons.you wont find them legally because of the legislation that the others have said.
What surprises me is that you dont see C.africanus,these are on the export lists of Egyptian dealers.I guess that its not worth the effort of the importers when you can get more visually impressive African and Madagascan species.