Stardust Clearo's

Has anyone ever seen a list of manufactsers, that make the heads for clearomizers? As you all know there is twenty different maker of clearo's out there. I have found that most of the sites I viset. May sell clearo's, but most often do not sell replacement heads. I am guessing that most clearo's are made in China. If that is so. It stands to reason that there is probaly only a couple of company's making repacement heads. To my way of thinking. That means allot of the heads should be interchangeable. China is way to smart to make 20 different heads for 20 different clearo's. I guess what I am looking for is a list that show all the clearo's and the heads that would be interchangeable on each of them. The list would help when ordering. How many times have you bought say a CE5 and that site only has replacement heads for vivi nova's or a vision V2. If we knew that those heads could work on CE5 and others. We would save allot of time and money. We would not have to pay shipping on another web site were we bought replacement head. The list I spoke of, should also include clearo tanks as well.