We have found 10 bags that match these dimensions.
21.625x13.125x10.5"
linear: 45.25" 40L
The bags below are not exactly the size you were looking for, but perhaps you'll come to like them.
52x33x21cm 20.3x12.9x8.2"
linear: 106cm/41.4" ~36L
20x12x10"
35L
53x30x22cm 20.8x11.8x8.6"
linear: 105cm/41.2" 31.5L
48.26x33x22.86cm 19x13x9"
linear: 104.1cm/41" 30L
20x12x6.75"
linear: 38.75" 28L
21x12x6"
linear: 39" 28L
46x29x20cm 18x11.5x7"
linear: 95cm/36.5" 24L
19x13x5"
linear: 37" 22L
47x32x20cm 18.5x12.5x8"
linear: 99cm/39" 18.8L