RedWigglersFarm.com sells worms to people that just bought a worm composting system. One of the popular systems is the subpod. https://subpod.com/
The SubPod system allows for worms to go in and out of the composter. It is buried in the ground. You feed the system through a door on the top.
We have found that many of our customers like the subpod system. If you are looking to get into worm composting, we would recommend you check the subpod out.