Pin for Vertical Blind Hanger

This is the pin for a vertical blinds hanger, that will be wrapped by the fabric of the blinds and put into the hanger. 

Somehow all I could find was Vertical Blinds Weights and Vertical Blinds Hangers, but my kids always kinda pull on the blinds and somehow those pins always go missing.

This should be an easy print, the size should give enough room for the fabric. I use them with some IKEA vertical blinds (do not really know the name of the product) it may just fit with other hangers here, otherwise you should be able to adapt the FreeCAD (https://www.freecad.org/) file, which is attached.