3d modeling of interior helicopter seats

I am looking for a 3D modeling expert to create highly realistic interior helicopter seats. The level of detail required for the models is highly realistic. I have exact measurements and a reference 3d model for the seats, so the freelancer should be able to work with precise dimensions. The desired file format for the final 3D models is surface/step with no mesh.

Skills and experience required for this project:
- Proficiency in 3D modeling
- Experience with creating highly realistic 3D models
- Ability to work with exact measurements
- Knowledge of surface/step file formats