We worked with a boy several years ago who had to have his hands and feet amputated. We modified a Sheriff Woody doll with the same amputations and gave the doll a set of prosthetics that matched the boy's. This helped the boy use his prosthetics and gave him a buddy who was just like him.
We made a demonstration doll for ourselves, but over the years the components to his handmade prosthetics were lost (one too many show-and-tells). This design creates a replacement set of prosthetics for the Woody doll.
For the standard Sheriff Woody (sold at Amazon, Disney, etc.), these pieces were printed at 80% scale. For the hinge hardware, I used #6 bolt, washers, and nut.