Precise OBJ-to-STEP Conversion

I need several OBJ models rebuilt as manufacturable STEP files. The parts will go straight to the manufacturer, so they must capture every feature in high detail. I will also provide accurate scans which... (Budget: £10 - £300 GBP, Jobs: 3D CAD, 3D Design, 3D Drafting, 3D Modelling, 3D Printing, 3D Rendering, AutoCAD, CAD / SolidWorks, CAD/CAM, Solidworks)