You can buy the Unda Numbers on the internet, although you may not find a lot of info on how to use them. There is a book by Dr. Thom that gives more info about them, if you google his name and the unda numbers you will find info on his book. The Undas are manufactured by Seroyal which is located in Canada - so if you are in Canada you should be able to find it locally if internet is not an option.