Very good. It's a problem many have encountered but not all have been as successful as you have been. Congratulations.
For years we have waited for somebody, anybody, to undertake a project of manufacturing these things. Remanuafacture. Some have talked about looking into it. I have not heard a word about any attempts to produce a product. You would need some money to pull this off I'm sure so I haven't looked into it.
You also need a good example of each type we could use to send to China or India. Don't think you are going to do it here.