I found the instruction for LEGO Leica M camera, so I built one for myself. Thanks to my kids’ Lego collections!
More info
Chris McVeigh’s Building Guides: https://chrismcveigh.com/cm/welcome.html
Leica Mini Camera Black/Gray (v2.1): http://chrismcveigh.com/lego_kit_guides_2015/mini_camera_black_v2.1.pdf
Leica Mini Camera Brown/Gray (v2.1): http://chrismcveigh.com/lego_kit_guides_2015/mini_camera_brown_v2.1.pdf