Rightline Gear Foam Block Kayak Carrier in the Automotive Hardware department at Lowes.com
Elevate Outdoor 120 lbs. Capacity Car Roof Foam Block Racks for Kayaks-K-CC-KIT - The Home Depot
Lomo Watersport - If you need a solution for transporting your kayak or canoe we have you covered. Check out our foam blocks at https://www.lomo.co.uk/acatalog/Canoe-Foam-Roof-Rack-Blocks.html https://www.lomo.co.uk/acatalog/Kayak-foam-roof-bloack.html ...
How to Strap a Kayak to a Roof Rack
SportRack Jetty Deluxe 24 Inch Foam Kayak Carrier | Atmosphere.ca