Yeah, I figured that they would be too small to measure, but not too small to calculate. If you can provide an accurate outside diameter and a tooth count, I can derive an approximation that is likely to be more precise than using the TLAR method.

To use the code I provided, you would have to install OpenSCAD for your operating system, then copy/paste the code into the editor. Press F5 to preview, F6 to render, F7 to export as STL.

The code shows an outside diameter of 2.0 millimeter and a hole diameter of 1.5 millimeters. Obviously, the outside diameter has to be larger, but you can see the comments (after //) in the code identifying each entry. If you are able to measure the part and change the 2.0 to the proper value to match. All the other dimensions can be adjusted in the same manner.