I'm afraid you won't find what you look for. The Gorgons are currently a discarded concept (one of the reasons was that D&D is a modern fantasy while Heroes 1-2 feature classic mythology or fairy-tale concepts).
The exception is made towards the concepts of Might & Magic VI: The Mandate of Heaven, for this is the game which officially continues the story of Heroes 2 and its plot has a special place in the development of H3SW. Yet, we tried to make these concepts looking more H2-ish all the way. Some may still need graphic improvements.