Go guitar pro replacement lightning cable

Hello, I have logged a support request looking for a replacement Mini USB to lightning cable for the go guitar pro. They gave me the part number, Q71-00002-27890, but I cannot find where to buy this from. Logging another support request asking where to purchase this just resulted in providing the same part number, with no solution on where to buy it. Does anyone know where I can look to find this? Google turned up nothing, and It seems mini USB to lighting is a hard cable to find, and I'm not even sure if they use standard pinouts or not. Any help is appreciated!