i purchased all mt P4's used and or crashed, and none of them have the cable that goes from drone to usb (pc) i tried assorted android ones and they dont work well at all, i got a mavic and it has one, and it works great on P4, WHERE CAN I BUY EITHER THE STOCK MAVIC OR P4 drone to usb cord, nd i dont mean the adapter small one, i have that, thats the drone to phone one.....thanks guys, i dont see it on DJI site, and cant find part number