The chassis and suspension of your RV wasn't built by Fleetwood, it was built by a chassis/engine/drivetrain manufacturer. Is your RV on a Ford, GM, Spartan, or some other chassis? That's where to search for parts. Ford and GM parts are available at about any auto parts or truck shop. Fleetwood used
MORryde chassis for some RVs, but without more information, I can't help you.