I have models I build in Carrara and send through NETFABB as exported .3ds and then out of NETFABB as .stl . I then can import to Solidworks 2013 which cannot export as .stl only as several .STP s or a Solid part or assembly. So with all the danger to me involved, I give you https://grabcad.com/dalestoner-1/models?page=3