STL Conversion of Mechanical Part

I need a physical mechanical part (elkay water fountain bubbler cover) converted into an STL file for 3D printing. The job requires exact replication but with some kind of split or (dovetail?) to snap the cover together ... (Budget: $30 - $250 USD, Jobs: 3D CAD, 3D Design, 3D Drafting, 3D File Scaling, Slicing & Print Preparation, 3D Modelling, 3D Printing, 3D Rendering, 3D Scanning, CAD/CAM, Solidworks)