I picked up a couple motorcross soft ties this weekend and i think they will work even better in the front. They are 15" long and combined with a carabiner or hook, will be the perfect length with no moving parts.
I also snagged another water tank with pump. It is a 10 gallon version with a smaller pump and was on clearance for $25. It was a return item cause the pump stopped working but I had it working perfect in half an hour. I had intended to install it under my truck somewhere and plumb it to the rear bumper as well as a sprayer under each door but even the 10 gallon tank is too big to jam in anywhere so I guess it goes on my bed rack or in the bed somewhere.