I think you are correct again Gasare.

Yes, it was possible, no questions on it, but who really wanted to modify a Himmler award that was the most important religious, mistical and esoteric symbol of the SS?

Who could have been so idiot? Who would have taken the risk? And for what? Just to see an officer saying: "my skull is cool!"?

IMO not believable. As Dave said, the barbed wire was a fast choice in those days...

Anyway I am always open to change my mind in front of a period evidence.