I have been looking for a tray of some kind with dimensions ~48x18x6 inches. Does such a thing exist? I would think it should, considering how many people have greenhouses around the world. I am open to plastic trays of any kind that would be around that size, but I have not found any. Usually when you get that length or width, it is accompanied by too much height. I suppose I could cut something down to size... but I would prefer an alternative.