Syneticusa Retractable Hard Tonneau Cover for Ram 1500 5.7 Bed 2009-2026 | Aluminum Truck Bed Compatible with RamBox | Waterproof Lockable Ram Pickup Bed Cover | Heavy Duty | 5-Year Protection

https://a.co/d/0dRRi1du Syneticusa Retractable Hard Tonneau Cover for Ram I've used similar to that one. It doesn't seal the gap completely at the tail gate because of the ram boxes but it's relatively flush and looks good. Also has drain tubes.