It's an 11mm DD shell I created for my DIY, I haven't ordered parts for the DD shell but I'll edit this post once I have gotten it. Anyway, feel free to modify the shell to your liking, be sure to use a small nozzle size for printing to have more accurate results. This can also fit a 10mm DD although it might move around so be sure to modify the shell to your liking. This is the Prototype shell I have, I'll be posting a 10mm DD Shell version soon. I did not add a logo since I wanted to share one for anyone to use or modify.

Update:

Added 1 Custom faceplates

A revised version of the shell for smoother air transfer on the DD to the nozzle

A shell venting system

Update: 

Added adapters for 10mm variants