Black cocoa butter emulsified sugar scrub

If you love using scrubs in the shower, you may want to try making this Black Cocoa Butter Emulsified Sugar Scrub Recipe  from Point of Interest's series of Experiments in the Workshop. Now I have never hear of black cocoa butter before so I am not sure if it is an easy ingredient to find but the author of this recipe says that you can use 10% shea, mango or any other soft butter and 10% cocoa butter in its place.