Might just have to make my own if I can't find one for a reasonable price in stores near me.
Fully featured backpack with free sewing pattern and step by step tutorial. Has a roll over top so you can add more or less and keep the bag the right size for the contents. Great school backpack for the kids too.
The Spinsterhood Diaries: Sample Fashion Project: Backpack Teck Pack
How to Design and Sew a Custom Backpack...This baby is just screaming for adaptions and modifications..go for it!!
Hand Sewn Leather Bags
Flask in genuine lizard and vegtan leather by alexlibris999 on DeviantArt