CATIA V4 Models (.model files) can be opened in Solid Edge program, which also has the support for DWG export so it is probably the best choice to perform a model to dwg conversion. Using CATIA it also might be able to achieve the same as DWG is defacto standard for CAD images.
Open MODEL file Open DWG fileA 3D product data optimalization software
A 3D CAD translation software