Much discussion has gone into this 🙂
Attached is one of the suggestions. It uses the crossword puzzle concept and puts some of the numbers in the lower cell and some in the upper (to represent the upper and lower numbers in the puzzle). No number signs are used so that the puzzle fits across one page.
Another suggestion would be to draw the basic structure (as a tactile) and then do the modifed version shown in the attached braille file.
We all agreed this is pretty ugly - even in print!