As someone missing a thumb, I messaged her asking to buy one as well to try and see if it could be assistive. Never got a reply, so I emailed the researchers she worked with, and they said that she holds all rights to the design so they are unable to provide me even with plans to build my own, and I would have to get her permission/access to it.
Overall it leaves a really bad taste in my mouth. It's been like 7+ years since it was first advertised by her and still nothing but PR and no attempt to interact with anyone who might NEED one, let alone those who WANT one.