Since it´s a pretty simple geometric form you might want to try and rebuild it in a 3D program like Blender. In fact, the geometry seems to lend itself wonderfully to being recreated in Sketchup, since sketchup has a great tool for adjusting the modeling space to one or multiple images and you can build the model easily with only lines and the push/pull tool in Sketchup. You can even use the 3D model to unfold it directly in Sketchup with the Flattery plug in and use that as a basis for a styrene model.