CNC Mountain Range Relief

I'm seeking a 3D STL or STEP file of the Glärnisch mountain range relief for CNC milling. The relief will be created on a wooden piece measuring 80cm x 30cm x 4cm, with the landscape orientation (longer side horizontal). An Stl from the top view of the mountain range is also included.

Requirements:
- Medium detail with clear features
- Undercuts must be avoided

Ideal skills and experience:
- Proficiency in CAD software
- Experience with CNC machining
- Ability to interpret and replicate mountain range topography accurately

A reference picture of the mountain range along with a sample of the final result will be provided.