I would take that lock to a really good locksmith. Chances are that Fleetwood bought, rather than made those locks, so you might be able to find out where they got them.
2004 Tiffin Allegro 27.5 ft. P32 18,000 lb GVW. 8.1 liter. Workhorse chassis built May 2002. 27,500 miles. 2012 Jeep Liberty Toad. RVi2 brake unit.