Do you have any of the separate parts for them? Shifters, shifting rods, etc.? If so, then when you make your ad for the hubs in the for sale section, you should post those up in the for sale section, too, because there have been a number of people that have been looking for them (including me).
OK, finally got these posted. Spare parts and hubs. Will post over in the marketplace area as well.
https://calfeedesign.com/product-category/components/nuvinci/