My approach has been to move all of the critical secrets out of the vendor device and embed it in a keyboard. It then works with anything that accepts a keyboard.. I'll be releasing this as open source (hardware & software) soon:
Sadly, proly not till next year. I'm funding this myself and hardware is hard. Embedding it into a case has a whole lotta mechanical engineering challenges as well.
The desktop and tablet version will be released this year though.
