3D Geometric Mould Design & Printing

I need a skilled 3D modeller who can create clean, watertight CAD files for a set of medium-sized geometric forms—specifically spheres, cylinders, pyramids and cones—ranging anywhere between 10 cm and 30 cm in their longest dimension... (Budget: £20 - £250 GBP, Jobs: 3D CAD, 3D Design, 3D Modelling, 3D Print Design, 3D Printing, 3D Rendering, CAD/CAM, Solidworks)