After I had a series of treatments with ozone from my medical doctor when I was sick with Fibromyalgia and I could see that it was effective, then I searched for one ozone generator to buy, because the treatment was expensive and for the price of three or four treatment series I could have my own generator. 
After I had some bad experiences I found a generator that I could use for all kind of ozone treatments and also for the sauna. I can recommend this generator that you can get from plasmafire.com  (If you go there and tell them that you come from FalconBlanco, then they will give you a discount of $100) Dr. Saul Pressman, who runs this company, also has a group:  ozonetherapy@yahoogroups.com where one can find excellent advice for every thing about ozone treatments for all kind of diseases and for many that are said about not having a cure... 
I'm using my ozone generator now since eight years without problems. In the beginning I used it with an oxygen bottle, that needs to be refilled, but later I bought an oxygen generator, what makes it much easier.