Molecule8 were supposed to be releasing a 1/6th scale Willy Wonker
They showed a grey scale head sculpt along with sculptor Mike Hill.
News has since dried up?
Using the power of Google, i checked out some of Mike Hill's work, and was stunned to see, he appears to focus more on life size, rather than the smaller stuff. While i failed to find any info on Willy Wonka, i did find this amazing American Werewolf bust by Mike
At the Academy with David Naughton and Rick Baker
That's Mike standing next to David Naughton
If PCS decided to do anything more with the licence, maybe they could get Mike involved.