There is no demand for such things in 2018, no sellers on EBAY and even worse, none on Aliexpress, there are few adapters left on the Elektor store with the crazy price, most likely leftovers from 10yrs ago and a couple of US sellers that may or may not be just cost sites.
Most likely if I do a PCB run (the Gerber files are all over), the few adapters that will sell will barely cover the costs, much less a "income stream", I understand that you wanted to be ironic, but most likely if nobody has some forgotten leftovers I will do some sockets mating, not particularly elegant, but this is it.
Thanks for nothing,
DC1MC