If you still haven't found it. http://www.all-drugs-online.com/Drugs/Disinfectant/default.aspx
I had put a comment in the forum from someone who said that Grapefruit seed extract mouthwash helped them a lot. But the link wouldn't work so I found another link after doing research. I was going to try the actual grapefruit seed extract but I take meds. Here is a link that will give you information. It's also good for other things, I'm gonna try it (the mouthwash) it even helps that tonsilitis and infections.
I looked up your mouthwash and from what I've been seeing it usually used for Gum problems and mouth sores. But from your symptoms it's possible that you may have an antifungal infection (well we know that's what Candida is. The reason I say that is this is that you have been using your mouth wash and it's helping but when you don't use it the tongue thing comes back, have you tried any anti fungals along wih your mouth wash? what about probotics too? I don't want to tell you what you should take but you may need to add an antifungal like grapefruit seed extract or Oil of Oregano is really good too. You've got to fight the bacteria inside the mouth and the digestive system because that's all apart of the system in the body.. I know you don't want to waste any money on useless products but probotics wit help infections, and antifungals will too and will stop the BB.