Converting 3D AutoCAD to Solidworks part

My company works with Solidworks after finally upgrading fromAutoCAD R14. I received an AutoCAD file from another company thatcontains a 3D model as well as the 2D drawings of the 3D model. Iwant to get the 3D model into Solidworks as a part. How do I dothis without remodeling the whole part?SolidworksGeneral