Sorry very late reply.
I was busy and actually forgot to check back.
The shell is not 3D printed.
I actually got a third one.
It was actually off of a 5G sim card router that was connected on a wall for internet to something.
The antenna was for data 4G or 5G but wierdly enough works well as a stubby antenna for the ft3d.
Thank you all for the reply and again I do apolegise for the really late reply.