High-Detail Scottish Crown STEP Model

I need a precise 3D STEP file that captures the intricate geometry of the Scottish Crown (part of the Honours of Scotland) at miniature scale. The file will serve as a manufacturing reference, so every relief, gemstone seat, and ornamental flourish must translate cleanly to CNC and casting workflows... (Budget: £250 - £750 GBP, Jobs: 3D CAD, 3D Design, 3D Modelling, 3D Printing, 3D Printing & Rapid Prototyping, 3D Rendering, CAD/CAM, Solidworks)