I can help you develop CAD models based on anything that you would like to make. I specialize in making models that take into account the tooling that will be made to manufacture them. Not only can I help you create parts that meet your mechanical and aesthetic requirements, I can optimize the geometry to be cost effective to actually make.
I have the most experience with Fusion 360, but am also familiar Solidworks, and OpenSCAD. I can provide solid or surface models in a wide variety of formats depending on your needs. I can also provide models that are parametric.
Examples of my CAD work can be found on GrabCAD.
As long as the surface model has no holes or overlapping geometry, it will typically be interchangeable with a solid model. Solid models enure that there are no holes or overlapping geometry in a generated mesh.