You should try
PetEdge.com Wholesale prices on exclusive dog grooming and pet supplies, the sell wholesale prices to everyone.
I've never tried the Pet Silk Shampoo & Conditioner, but I just started using
Pet Silk Topknot Gel that I ordered from them for only $6.99, it's Great Stuff!
I also noticed that they had the whole Pet Silk line of Products. Hope this helps?