Case for radio-electronic equipment, for example, GAINTA has interesting cases with any proportions. But ergonomics will be... meh... like a brick or first GameBoys) I think it's better to complete your NesPortable without case, and then find someone who has 3D-printer and make the box, what you...
Hello!
I am from Russia and I am a novice in making portable consoles from stationary consoles) Glad to find this site and hope on you with that my new hobby)
Thanks a lot)