Hi, I think the last time I ordered the Coathandlers I got it from this company
http://www.ryanspet.com I use the 15 to 1 concentrate. The
reason I think is, that I buy the gallon size which will last me about a year.
Both the shampoo and the conditioner are concentrates which means you mix
1 part shampoo to 15 parts water and it will last a long time. You might be able to find it a little less but not much more.