Your 2019 Forest River FR3 30DS Motorhome is built on a Ford F-53 chassis and we do have sway bars and steering stabilizers for it. All products for your FR3 appear on the linked page.
For the 18,000-lb GVWR of your 30DS you can use Roadmaster rear anti-sway bar # RM-1139-146 which will work along with your factory sway bar. You can also use front sway bar # RM-1139-148 which will completely replace the factory part. For a steering stabilizer you can use the Roadmaster Reflex # RM-RBK22-RSSA.... view full answer...