Here's my two pennorth- a custom head for Alyson based on a real person, Hazel. I know the hair materials need a bit of work- I've sampled the colours from the reference pictures used to make the morph, but all have a green tinge for some reason.

The morph was made largely using the morphs included with Alyson, but I had to resort to using Zbrush for eye shaping and adjusting the forehead.