Large 3D Relief Map of Switzerland

I'm seeking a large, over 24 inches, 3D relief map of Switzerland for display or exhibition purposes. The map should represent basic topographic features, without the need for detailed terrain elements such as roads and landmarks or featuring buildings and natural elements.

Ideal skills and experience for this project include:
- Expertise in 3D modeling and design
- Experience creating models for display or exhibition
- Understanding of basic topographic features of Switzerland
- Ability to create large, detailed models
- Knowledge of suitable materials and techniques for creating durable, visually appealing display pieces.