Availability is not a concern here as there are many a Wicca stores which sells these tools. Before one buys any of these tools one need to understand them, so that they would know the purpose of each of these tools.
In many cases it is the Wicca stores that you come across or some of the things which one generally associates with them like Chakra Posters or some other symbols.
A Chakra Poster would help us to understand better these different chakras. You could get one of these very easily at any of the Wicca store and even available online.