This is one of those parts that DJI doesn't sell. The only way to get one is to buy a whole new P3. They don't even come with the new body! DJI designed this part with rubber vibration isolators to improve the accuracy of the sensors on the main board. If yours breaks in a crash, you have no choice but to cobble it back together and possibly cause the copter to be unstable.
I designed this to be a little tougher than the original DJI part. It's not more rigid, it's just a little more flexible. It's 3D printed using high quality ABS filament (the same material as Lego blocks) so it performs well in both hot and cold weather. It's a direct replacement for the original DJI part, so you will need all your original hardware.
Buy them here: Dji Phantom 3 Battery Box Main Board Support Tray
I designed this to be a little tougher than the original DJI part. It's not more rigid, it's just a little more flexible. It's 3D printed using high quality ABS filament (the same material as Lego blocks) so it performs well in both hot and cold weather. It's a direct replacement for the original DJI part, so you will need all your original hardware.
Buy them here: Dji Phantom 3 Battery Box Main Board Support Tray