Hello Everyone.
I am looking for a rather large bag to go behind my seat, and attach to the seat. I have a new one that is too small to hold my basic survival tools, and my cellphone, wallet and keys.

My basic tools are a Crank Bros. tool, a tube, tire irons, and 2 CO2 cartridges and applicator for inflating tires. with this set up, my wallet and keys cause the bag to be packed full. My cell phone will not fit no matter what, it is just too long with the antennea. I looked at Nashbar, but their biggest bag seemed a little small. My LBS only has the smaller type seat bags.