It´s not for commercial sale as of yet because of patent issues I believe, if you´re handy you can easily build it yourself with the help of microelectricitygermkiller forum at Yahoo Groups, if not I could build you one for cheap money(to give you an idea I believe a top quality Godzilla model with the meter built in etc should cost no more than 120 USD if I build it for you). It ´ll last a lifetime or at least many years with only battery switching now and then as a cost.
If you´re interested send me a mail at: firstname.lastname@example.org . I have built 5 devices for my friends and family and people just keep coming every week wanting devices for a large variety of health problems. Last week my brother got a real bad blood poisoning and after that he´ll never use antibiotics again. Godzilla kills every bacteria, fungi, virus(including HIV!!, see results at Yahoo Groups) and parasite in the blood in hours so I believe it´s a good idea as a safety precaution for all people to have at home in case they get acute ill.