There is a member here who sells them, Jenny. Her screen name is Mimimomo, and she has a website
toplinepet.com
She is very helpful. There are different Madan brushes for different coats. I bought the black one because it is firmer, and my pup has a thicker, soft coat (people call this a cottony coat) that tangles often. She sells the combs too. PM her and she will help you find the right brush for your pup. The other brush I use I bought off Amazon.com. It might sound excessive to have 2 brushes and a comb for 1 dog, but his coat requires the extra work. A nice silk coat is easier to manage.