Woodpeckers Clamp Rack-It Mobile, a Heavy Duty Clamp Cart
Rockler F-Clamp Rack for Wood Clamps (24-3/8”), Rack Helps to Store Heavy Duty Clamps – Galvanized Steel Clamp Rack – Store Clamps up to .30” Wide - Workshop Organizers and Storage - Bar Clamps - Amazon.com
Clamp Storage Ideas for Your Workshop. – Woodworking for Mere Mortals