Earlier quoted context omitted.
I'm afraid I don't know of any premade options. I've been considering building my own and have recently dropped out to start working for myself; I'm thinking, perhaps I could build one for you? It'd depend on how soon you need it and to what spec, as I'll have to source it from scratch. If you leave some means of contacting you I will, I'm quite interested in building these things for another purpose than "I like hav…
I'm passively looking for a machine at the moment but not really actively looking yet - this one's still got a fair amount of life in it. If you want to reach me, the email in my profile works. Are you planning to do a libre hardware startup or something?
"Secure hardware + software for the masses" is one area I'd really like to work on.