Have a shot where you need two of the same Lego but don't have two of that Lego? Just crop out one side of the frame containing the Lego piece and overlay it on the frames where the same piece is being used. Windows Paint works fine.
The red arrows point to the piece I doubled, and the white line represents the cut I made in the picture, allowing me to overlay one side of the frame.
Or I could've just bought a new Lego, but I'm cheap like that. Haha.