I have been looking for the beta art of Artemis for a very long time, and quite funny enough, I eventually realized that Beta Artemis Art was actually used on the cover art of AOM, and eventually re-used for the steam page of AOM EE. It was just difficult to see due to the lower resolution of the older images.
This is the highest resolution of the cover art I could find. I am hoping that higher resolution Beta Artemis image still exists somewhere.
My crappy photoshop :P
Maybe a photoshop wiz out there can do far better job then I can.