I haven't looked through this whole site but from what I did see, it looks great. All the downloads are free!
http://www.montessorimaterials.org/I don't know a whole lot about the Montessori method so hopefully this will be helpful to you. I'm sure you could also find other materials that would be useful in everyday stores. I know with this method it is good to allow your child to do things for themselves at the earliest time. So getting things that are on a smaller scale for them to use is great. Like a small broom or a plastic pitcher for pouring thier own drink or a stool to make it easier for them to stand at the counter to help you cook or wash dishes.