I'm not familiar with your unit, but our 2011 Sunseeker Class C model 3100 has drawers under the dinette seats. Maybe all current Sunseekers and Foresters have these drawers. If you are near enough to a dealer, you could take some measurements of one, see how it is installed, and buy the parts to convert yours.
Alternately, you might find something at Lowes, Home Depot, etc., that would work. Rev-a Shelf has lots of pull-out drawers. We converted two lower cabinets with their stuff when we remodeled our house's kitchen. There are other brands. You can get kits to attach the existing doors to the pull-outs, or just leave them on side hinges.