Create 3D model of wooden shoe tree

Design details: Hello Designers!

We are looking for an experienced designer who can create a 3D-design of a new wooden shoe tree.

The file format should preferably by ".MOD", which seems to be a specific file type for CNC shoe last machines.

The alternative would be a different file format, which can be converted.

If possible, we would also like/need a 3D-printed prototype.

The shoe tree should look somewhat similar to the attached sample image.

As we are not yet decided on the exact final form, this job does require some "creativity", in terms of providing some alternative designs.

We will provide length, width and height as well as some other measurements. If needed, we can provide samples of existing shoe trees to get a feeling for the product.

Please feel free to ask questions, as I am not familiar with the specifics of 3D-design.
Ideas for the visual style: see job description
Things to avoid: see job description
Extra notes: