3D CAD Models created specifically for 3d Printing

I am looking for a CAD designer, expert that can model components for 3d printing. You should be able to work from images or drawings that I supply to model the components. I may have STEP files for some components... (Budget: £250 - £750 GBP, Jobs: 3D CAD, 3D File Scaling, Slicing & Print Preparation, 3D Modelling, 3D Print Design, 3D Printing, CAD / SolidWorks, CAD/CAM, Solidworks)