With a few minutes and fewer tools you can set up your own red worm composting system in any raised bed.
Tin snips or box cutter
Plastic planter or bucket
Shovel or other digging tool
Stone or cover for the in ground bed
Find an old plastic planter and cut the bottom out.
Find a well drained spot that is protected from afternoon direct sun. Dig a small hole big enough to bury the upside down container. Add some shredded paper products and some compost. Moisten your mix and add worms. Cover w/ a paver or stone to keep out critters, and protect from elements.
Depending on the amount of worms, a handful of kitchen scraps every week or so will be plenty to start. As your worms grow and reproduce they will require more frequent feedings. Do not over feed. Be patient and when the food is processed by the worms, add a few more kitchen scraps. Keep an eye on moisture. If kept out of direct sunlight, the food scraps will usually provide enough moisture for your worms. Worms like it wet because they breathe through their skin, but will drown in standing water.