Go back with the piece of paper saying your attorney will contact them shortly. Your axles were improperly place on the frame when welding the spring hangers. This is causing some tire to "push" against the road, and others to "drag" down the road. Over time this will obiviously wear the tires out, but will also damage the bearings inside the hubs.
Your dealer is right that the axles need replacing. They need to force the issue with Lippert, but that may be difficult to make happen because of the dealer-forest river-lippert relationship