The case was modelled using Pro Engineer CAD software and then rapid prototyped by a company in the UK (more about that later).
One disclaimer before we start - I'm currently on the huge waiting list to get a raspberry pi so this case has been designed around the official dimensions for the device. Until I get my hands on one of the units I'm unable to guarantee it will actually fit.
Step 1: What is the Raspberry Pi?
- source - The Raspberry Pi Foundation - www.raspberrypi.org/faqs
Step 2: Get the CAD files
The files were exported in the STL format. I'll go out on a limb and say 99% of 3D / rapid prototyping machines will work with this file format.
The STL files can be downloaded from the 123D gallery:
Alternatively they can be downloaded directly from this instructable