I have looked for Rubik's cubes for blind people and just found some from cube4you, which are not good for this purpose. Their stickers are very hard to recognize with the fingers and the centers are not symmetrical, which makes teaching a blind person harder.
I have seen a video of a competition in Indonesia with many blind people and saw the kind of cubes they use. Then I tried to do something similar and the result you can see at the 40sec of this video:
This is a friend of mine (Fábio Borges) who can solve the Rubik's cube now in less then 3 minutes. He got used to the stickers, but we still think that we can improve them. But the great problem is to produce many of these as it took us about 2 hours. We want to teach many more blind people here in Brazil, but we need to have those stickers ready to use. I tried to talk to the main sticker producer that I know from the US, but it seems that they won't produce them, although they said they are interested in it as many people request it to them.
I gave a Mirror Blocks to Fábio Borges and he could solve it with the things he learned from the Rubik's cube we have prepared. So the Mirror Blocks is a puzzle that already comes ready for blind people to use, but I think it is harder to teach the layers method with the Mirror Blocks before teaching it using a regular 3x3x3 cube.
Do anyone knows who could produce stickers more or less like those in Fábio's video, ready to use?