This is where I bought mine:
Westbrook Dog- Pet & Show Dog I bought a gallon, but it looks like they only have the 16 oz or the sample size now.
Ooops -- someone already posted it while I was looking up the link
Now you have two references for the seller. I like it a lot! I am so sold on the way it naturally keeps the fleas away! It also leaves a beautiful shine. It lasts forever too -- I have shared my gallon with two other people and still have some left.