Vector graphics saved or more typically exported for printing purposes as Encapsulated PostScript files (.eps), can be usually imported back to some of the better vector graphics editors and possibly saved as 2D CAD (.dxf) file. You can even find some vector graphics converters created for this job, so eps to dxf conversion should not be a problem.
Open EPS file Open DXF fileA 3D modelling software
A 3D CAD translation software
A CAD CGM converter
A free graphics editor