This could be a downloadable 3D printed file that companies can print and sell on their own.
I found this figure as a SANIX company product sold by “Modern Armies in Miniatures.” But as others have said, the high DHL Shipping prices are the issue with buying from DerSockelShop.
https://www.dersockelshop.de/model-figures-busts?p=1&o=1&n=40&f=272
I think that the SANIX line is much better 3D printed quality than the rest of the figures sold under MAiM.