Thank you for providing this. I am using it for prototyping and it serves much better than using the same square with different colors to represent things haha.
Also for anyone reading, it is not mentioned in the page but individual letter sprites are 100x100 pixels. I also made a modified version below by making the spritesheet black & white and mapping the yellow to pure white in case anyone wants to further modify and recolor it.
Same terms told in the page apply.