hpgent: If you're talking about the planting cages and growing medium pods for an Aerogarden go to their website online and they have them in stock. If you buy them in bulk they're a lot cheaper. I've seen people try to get around buying Aerogarden's proprietary stuff by using other materials and they don't usually work as well. If you buy in bulk it costs you about sixty cents to set up a plant.
If you're not talking about an Aerogarden then you probably need to go to your local hydro store.
