Try the RAID pack.
http://www.assaultpack.com/ Cost is about $180. Made by Eagle, so it has a lifetime guarantee. You can get them at Lightfighter.com, but Brad also has brick & mortar stores at Bragg and Campbell …if you happen to be near one of those “garden spots”.
I have two, one for the field and one for use as carry-on luggage. They work great!
Gary