Here is a nice gear bag from Tempress http://www.tempress.com/store/produc...ducts_id=31288
Holds all your mandatory safety gear, personal items, and hand-held electronics. This bag secures over the bench seat by a hook and loop fastener strip, and is easily removable. Large main stowage area measures 28" across x 10" wide and 7.5" deep. Two zippered mesh storage pockets on the front plus one covered pocket in the center.
Constructed of 600 denier polyester with UV resistant PVC lining. Thick, cushioned seat is 35" W x 10"D. Stainless steel drain grommets in bottom. All zippers have molded nylon pulls and are self repairing.