Doing a quick calculation with an estimated propeller radius of about 2 inches and a typical rotation speed of 6000 rpm, I'm getting that the radial acceleration of the tips of the propellers is about 2000 G's. Associated with those large accelerations are large stresses on the propellers including large stresses on those hinged rotating joints of the Mavic's propellers. So, no, I wouldn't take a chance on using some unknown, 3rd party vendor or seeing if you can use propellers that you made yourself with a 3D printer. Best to use proper OEM propellers for this critical part of the Mavic.