A little tool that some people might find useful http://bulatov.org/polyhedra/stellation_applet/index.html
It is surprisingly flexible for a small Java applet, and has the virtue of DXF export, which can be passed through Blender or another app to create an OBJ. On first look, you might think it only exports polyhedra, but its real power is revealed when you start looking at the stellations, because by changing the symmetry group, you can export individual prisms and pyramids, mash them together in your app of choice, and bring them into TG2.
Below are two images to give an idea of what it can do.
If anyone has questions about how it works, I'll try to help :)