Amazon.com : NTR Water Rescue Throw Bag with 50 Feet of Rope in 3/10 Inch Tensile Strength Rated to 1844lbs, Throwable Device for Kayaking and Rafting, Safety Equipment for Raft and Boat :
Throw Ropes | West Marine
Stearns Rescue Mate Throw Bag - Columbus Supply
Standard Water Rescue Throw Bags – Force 6
Rescue Throw Bag - No Rope | River Safety & Swiftwater Rescue Gear | Solgear