where should I get MC to start?

ok well I did write earlier about starting the Master-Cleanse but no one has yet to write me. Hopefully someone will see this and will respond. Ive been doin alot of research and not sure where I should purchse the things needed to start. I found a few websites and they all seem to be about the same. Can anyone recommend a site and what else i might want to consider to purchase. Thanks again