TC1 Slinky Seismometer Parts

I recently built a TC1 Seismometer (http://tc1seismometer.wordpress.com/). Some of the required pieces were not readily available at a hardware store, so I decided to use my 3D printer to produce the parts.
The parts include:
-A slinky holder.
-A stabilization ring.
-A base cap.
-A pickup coil body.
-A damper tube holder.

Note that this Thing is just for some of the components of the seismometer. There are many other parts needed for a complete assembly. Also, I'm not affiliated with the people who designed the TC1, so I'm unable to answer any assembly questions.