[AndrewC]

Evidently, this is not a replica. They used an inferior quality specimen to illustrate their point. Why?

[VadeRetro]

They used an inferior quality specimen to illustrate their point.

The "better shape" replica isn't in "better shape" for all points. In particular, it is missing the "forehead" area prominent in Thewissen's specimen.

[VadeRetro]

Your drawing looks like another view of the fragment gracing the top of Dr. Thewissen's Pakicetidae Page. He seems to prefer his own finds.

[VadeRetro]

Not to mention the Thewissen one gives you a better shot of the interior.