Shoot me the idea and I see if I can help ... Of course if you can trust me
Did you bother to read the whole thread before you posted this? The OP posted his idea 2 hours before your post, and people replied after that.

If you missed it, here it is :
For anyone curious i can divulge what i was thinking be ause i found a nerd in germany who basically built exactly what i wanted to build. Basically a private key generator with a printer attached all in one box, all offline.
www.youtube.com/watch?v=noW77GqmNBQI thought i had an original idea for a second. Silly me.
Although i would add a human input for their random number generation. Because theyve proven computerized random number generation can be reverse engineered.
To the OP... Does this "nerd in Germany" have a patent on his product?
You might be able to improve on his concept and then pitch this to the bigger printer manufacturers. Lexmark / Canon / Brother / HP etc. etc.. You never know.. there are still a opportunity that he has only a patent in Germany.

I like the idea, and how this would bring widespread adoption. {I can see this already ... A sticker saying "Bitcoin enabled device"}