You've decided to try worm composting. You've found where to get worm farms - any kind you want. But now, where do you get the worms? Many of the lawn and garden centers that sell worm farms will also sell the worms to stock them with. If you are lucky enough to have a large worm farm located near you, they often sell their excess worms. If you don't have one near you, there are many listed on the internet that ship to the surrounding area. Some have figured out how to ship them nationally.
Since many of the worm farm kits do not come with worms, it will be up to you to find your own. Be sure that when you are getting them, you get composting worms and not regular earthworms.