Two sets (four) Yakima J-Hooks rooftop kayak carriers. PRICE $75
Carries almost any type of kayak while taking minimal space on your roof rack.
J-shaped cradle is secure, stable, and easy to load.
Durable padded contact points provide protection and grip while traveling.
These hooks come ready to attached to round bars. I do have hardware for other types of bars including aero bars that I MIGHT be able to work with you to make this work.
Contact me for more help or pics.