Call Reese 800 521 0510 and ask. They have been quite good at replacing items that fail because of the image they want to protect.
Be very careful inspecting anything you get from them now days. Product is made in Mexico and has no quality control as noted in the second picture. 2 sets of these hangers came in unusable. I rewelded the holes closed and drilled my old hangers.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles