Ivory Soap Flakes, where to get ?

I wanted to thank everyone below for the suggestion of using a grater for a bar of Ivory soap. I, like others wanted a consistent measure of soap for my enema and this trick was perfect! Thanks so much for the excellent suggestion.

I went with a little more than 1 teaspoon of the Ivory powder per quart of water. It was very effective. For my second bag I think I will use less soap, perhaps 3/4 teaspoon per quart.