Home Depot and Loews, et. al. want you, the consumer to feel pressured to buy the whole cabinet for $30. They are not interested in letting you get the replacement parts. Only in the recent past have all stopped carrying the shelves but they all used to have them. I found a place in Los Angeles that still sells them - cheap metal ones, but they work. Old fashioned hardware stores may still carry them. Forget Home Depot, their ripoff products are getting worse and of lower value all the time. And their tricks to get you to spend more are offensive.