Pipe-in-Pipe Heat Exchanger Model

I need a precise 3D model of an HVAC pipe-in-pipe heat exchanger created natively in Autodesk Inventor. The project is limited to pure modelling—no moving components or animation are required—so the focus... (Budget: €30 - €250 EUR, Jobs: 3D CAD, 3D Design, 3D Modelling, 3D Rendering, Autodesk Inventor, CAD/CAM, Solidworks)