Your first post states, "Since I already have the scanner," which, in the context of 3D printing means a 3D scanner, not a flatbed scanner for typical computer/fax/copying use. If you mean the flatbed or sheetfed scanner, it's not going to accomplish anything at all.

Even before you get your calipers (measure in millimeters!), do an eyeball measurement. That is, hold a ruler along the appropriate points and provide what you can. When you have more precise data, I'll swap it into the code.