I don't see any dates on these posts and have no idea how old this question is so I apologize if I am years too late on this. I am trying to make my own urea based cream to treat exfoliative keratolysis as the creams and lotions that are available are very expensive. I found pure urea in a powder form from an online shop called Dharma Trading Co, they use it for an additive to dye for tie-dye art. I also found it on Amazon with a search for "urea powder" and another online shop called Making Cosmetics. I am not allowed to post links here, but searching for "urea powder" is giving much more relevant results than "urea" alone. Urea seems to be cheaper when buying as art supply or fertilizer rather than cosmetics, but I am not sure if the purity is the same or significantly different.