Kayak storage hangers for boat

We have two kayaks and love to use them. We also purchased a pontoon boat and would love to take our kayaks with us in the boat and use them from the pontoon. My question is this: is there a way to transport the kayaks on a pontoon. Would like to have some sort of straps or something to hang them on the sides of the boat from the rail. Any advice would be appreciated.

j-racks
the kind that screw to the wall of your garage.

Just make certain that you have straps to keep them from falling off.