There is a way to make a 3D model from the original. A lot depends on the original item. The clear clip seems to have been reproduced on Thingiverse (Valance Clip) with the procedure with which the user created his model.
Here are the steps to reproduce the clear clip according to the original user, mattfriedman:
- Use a black marker or paint to color the profile of the item
- Place the item on a scanner or take a top-down photo (with a white background) of the item
- Import the image or photo into Adobe Photoshop, GIMP, or image manipulation software of your choice
- Remove any stray marks and clean up the edges of the item's profile as best as possible
- Import the image into Adobe Illustrator or Inkscape
- Use the "Image Trace" or "Trace Bitmap" menu item from your particular software to vectorize the image into an SVG (you may need to do additional path and point cleanup)
- Import the 2D SVG into Tinkercad, Fusion 360, or other modeling software.
- Extrude to the desired width/depth.
You now have a 3D model of a real-world object without scanning.