Yes, you can make a good approximation at home! Mix 1/4 cup each of water and brown sugar and bring it to a boil. Once the sugar is dissolved, add 1/4 cup of miso paste and stir until it makes a smooth paste. Then, add ~1/8 cup of red chili powder to this and continue stirring until dissolved fully. Take off the heat and let it cool to room temperature, add a splash of rice wine vinegar and store in the refrigerator!