We have found 10 bags that match these dimensions.
65x28x14.6cm
57L
The bags below are not exactly the size you were looking for, but perhaps you'll come to like them.
47x26x14cm
36L
43x28x14.5cm
~17L
38x27x13cm
linear: 78cm 16L
39x28x12cm
13L
30x25x13cm
linear: 68cm 8L
29x20x13cm
linear: 62cm 7L
20x15x8cm
linear: 43cm 2.5L