Not sure if you can still get the ninja model from Psionics site. None of the model resource links worked last time I was there, anyway, but he may have just been updating the site.
If not, then you can get it from the resource section at the link below, along with a few other free models.
http://www.insanesoftware.de/
If not, then you can get it from the resource section at the link below, along with a few other free models.
http://www.insanesoftware.de/