Not perfect, but satisfied after DIY

I find the color sober and class, in addition to being really uncommon. By cons, it does not include the system standby / automatic activation of the screen when closing / opening the flap (some will see a benefit, each his own). But since I was 2 smart covers of side view, I have sacrificed to integrate the small magnet (small flat disk about 5mm in diameter) in the right place, with a cutter and patience.
And for those who might wish to do the same, I link an image to locate the sensor. It is 1cm right of the red dot, below the display (invisible, and nothing to do with the sensor placed at the top of the phone).
Before you start torturing your cover, ensure the compatibility of your magnet, and its proper distribution;)