You should be able to find the Khasi Braille Bible or books of the Bible to be available from Lutheran Braille Workers.
http://www.bsind.org/The-Khasi-Braille-Bible.html
http://www.bsind.org/
If you have any questions or need help finding a particular video, tract, book or any other Christian resource in any language of the world, please contact brianformissions@gmail.com