[kicad-users] How do I import 3D for a part that is not supported by KiCad/Wings

[jeffrey_franks]

I'm new to KiCad and have a project that requires a Waco terminal block. Waco 
provides 3D files of the following types:
  1) CATIA
  2) IGES
  3) PRO-E
  4) SolidWorks
  5) STEP

Which one can I use and how? 

We have no other commercial CAD system and so we need a solution
that uses only open source.

Is there a way to do this?

--jlf