Basic 3D Wheelchair Cushion Model

I need an animated 3D model of a 3D-printed wheelchair cushion for visualisation purposes. I also want to include the WheelAir ventilation system connected to the cushion through tubing. I want the animation to include cool air blowing through the top of the cushion.

Requirements:
- Models should represent basic shapes of the cushion and WheelAir, with rotation animation and air blowing.
- Accuracy in dimensions and proportions is essential
- Deliverable in a common 3D format (e.g., .STL, .OBJ)

Ideal Skills:
- Proficiency in 3D modelling software (e.g., Blender, SketchUp)
- Experience with product visualisation models
- Attention to detail and precision

Please provide a portfolio showcasing similar work.