The OEM rear mudflaps for the Mark 7.5 GTI are slightly different to those fitted to the Mark 7.
The correct part number is 5GV.075.105A. Please note the A is crucial, because if the part number doesn't have the suffix A, then the mudflaps are for the Mark 7 GTI and won't fit the current model.
The OEM part number for the front mudflaps on a Mk7.5 is 5GV.075.116 but I am afraid that I don't know if the part number is different for the Mark 7.