You can find these very useful accessories in fireplace specialty stores or even some hardware stores and big box home centers as well. A search done on your favorite search engine will provide information on where you can purchase them as well. You can even buy them online but keep in mind that you will pay shipping and handling charges as well.
To assess practicality of the fireplace, we can judge it through its function. Its purpose is same as the classic wood fireplace and so is its function. It produces the same amount of heat as wood powered fire, eliminating the risk of flying sparks, smoke and other risks. These electric units generate no smoke and therefore don't require ventilation. There is no need of getting a chimney built or a duct system.