Add Components to SolidWorks Drawing

I have an existing SolidWorks drawing that now needs several additional components integrated into the assembly. All source files for the new parts (or clear sketches if you prefer to model them yourself) will be provided as soon as we start... (Budget: £10 - £20 GBP, Jobs: 3D CAD, 3D Design, 3D Drafting, 3D Rendering, AutoCAD, CAD/CAM, Mechanical Engineering, Solidworks)