Keyboard/Caps with individual texture you can tell apart for each key

Effectively braille but keyboard, but without being actual braille (I've seen them, not what I want) I envision some kind of comfortable keyboard with textured keys where putting your hand on QWERTY or ASDFGH lets you feel exactly what key youre on with your fingers without looking. It doesn't even necessarily need to be like some raised indent that feels like a Q, that might be uncomfortable and shitty, but enough texture to tell each key apart with experience.

Does this exist? if so, where?