Update Simple 3D Box Model

I need assistance updating a simple 3D model of a box. The model requires the following updates:

Key Requirements:
- Modify one face of the box to be identical to another existing face, which is currently open.
- Update the lid to align with the new face modification.
- The model is provided in STL format, and I will supply the existing model for reference.
- No additional text or logos are needed; keep the design plain.

Ideal Skills and Experience:
- Proficiency in 3D modeling and editing, particularly with STL files.
- Experience with software like Blender, Autodesk Maya, or Tinkercad.
- Attention to detail to ensure precise modifications and alignment.

Please ensure the updates are accurate and maintain the integrity of the original design. Looking forward to your expertise in refining this model!