Those are usually standard hardware items, available in good hardware stores and woodworking hobby shops, but there are dozens of different types available. You won't find part numbers on the items themselves and Fleetwood may or may not still use the same ones on newer models.
If Fleetwood can't help, you may just have to search woodworking and cabinetry catalogs (lots of them online) to find a match.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL