Dread Head is a great source to learn how to dreadlock your hair and buy dreadlocking kits and products to help you along. You can also find beads for dreadlocks, hats and t-shirts at the DreadHead site.
The Supa Dupa Dread Kit is the main dreadlock making kit offered at the online store. There is an extensive guarantee attached to this product giving you 90 days to end up with the dreadlocks you want. If this doesn't happen, you send a picture of your progress to the owners, who will give you advice on how to proceed. You then continue, taking the advice into consideration for 60 days. If your hair still doesn't lock, you get all of your money plus shipping returned to you.