I finally got tired of waiting and knocked out a model to use as Alpharius. He doesn't match the artwork, but he is unique looking and large enough to not be mistaken for something else. Pretty happy with him overall.
And lo they gazed upon a hill atop which a bird did sit
but when they climbed that hill there was no bird at all
only twisting coils and the faint memory of feathers
The snake on the ground has caught the bird in the sky.
When the raven hunts the bat, he forgets the serpent that's
-The Aventine Creed
Alpharius Gamma, 'The Aventine'