LApolicegear.com sells one that you'd probably like (for much cheaper). LApolicegear basically stole the one from Countycomm.com. CountyComm has a larger version of the same bag.

I was really interested in the Countycomm bag (and LApolicegear JUST finished a 12 hour sale where they sold black ones for $10), but I decided that a backpack would be better, if I ever had to actually bug out on foot.