Thanks for your email. I can share a document with you which shows how far the discussions went. 

Essentially, the biggest barrier to this is funding. I spoke with some people from WikiFactory about this and they already utilise similar technology. They are able to do the work and the implementation to enable Commons to host openly licensed 3D design files and printable files in .amf and .stl formats, for all browsers, for about £22k. We're currently trying to find a way for the project to be funded and are in discussions with Wellcome Trust and others. Once implemented, there are hundreds of thousands of printable files that can be imported to Commons under compatible licenses and can then be printed directly from Wikipedia articles - such as tools, clothes, medical models, prosthetics, architecture models, building materials... as the cost of 3D printing goes down and the availability and quality of printing goes up, this could be a seriously important development and enhance the role of the Wikimedia projects in sharing the sum of all knowledge in many different forms

I'm happy to discuss this in more detail if it is useful.

Thank you,

Stevie