It will not more simple to say to Solidworks users to use an Export 3dm ?
They are existing some add-in ;)
http://www.sycode.com/products/3dm_export_sw/

And from the docs of Solidworks seems export for Rhino so 3dm is existing!
http://www.solidworks.com/sw/products/3d-cad/cad-import-export.htm