There are DIY webcam-types that are inexpensive, but won't be precise:
ProFORMA - create 3D models with a webcam
There may be services from owners of high end machines that can scan it for you:
https://www.nextengine.com/
3D Scanning-3D Scanning Services | KONICA MINOLTA
If the design is simple enough, make a CAD file from free programs that can be converted into machine language.
That's the extent of my knowledge base.
3D scanner - Wikipedia, the free encyclopedia
More awesome wikipedia info and links.