Have an older SwissGear 1775 I love, but it will only hold a 15".
The pack is bullet proof, and love the soft style carry handle to pick it up when I not wearing the pack.
If you check on Amazon, you can still find the older older Swissgear bags, and may luck out and find one that will fit a 17" that is on the smaller side as well.
P.S. Even though the pack should have a padded pouch section for the laptop, might want to pick up a soft sleeve bag and thin piece of foam to throw it in first, before shoving it in the pack. The thin piece of foam I put between the keyboard and the screen before closing the lid down (to prevent screen marring from the keys on rough flights), and the sleeve keep it from getting scratched when going through TSA, since it just put the laptop in sleeve in the bin to send it through X-Ray that way (instead of loose in the bin to get scratch by other items in the bin to the side).