CADCAM-E (CCE) has a free translation utility that does the impossible. Well, impossible if you listen to all the FUD messages. Apparently it's so easy it's not even worth charging for. Get more information from the links below.
Sources:
http://worldcadaccess.typepad.com/blog/2013/06/dassault-wont-give-you-this-free-solidworks-catia-xlator-but-cce-will.html
http://www.cadcam-e.com/products/cat5works/