Originally Posted by FastJake

Thanks to wesmamyke I am now the happy owner of this tool. I can confirm that the measurements in post #6 are accurate but they leave out the critical "minor diameter" of the splines. This diameter is 13.03mm which means that each spline is 0.84mm tall.

If anyone wants, I can draw this part in SolidWorks (which can then be saved with various file types) if you want to have one made.