I purchased my Phantom 2 V2.0 on 12/8/14. The S/N starts with PH646012 (V2.0)(Model P330Z). The ESC inside are all V2.1. I need to replace two of them. I can't find a vendor that has them in-stock. All they have are V2.0. I called DJI, but they want me to ship the unit to them for repair...