Got around to doing mine. Went with an 18"x 24"x 1" white cutting board off of Amazon. Trimmed the 18" down to sit flush with the edge and included the angle of the rear wall. Added 3M 6"x 24" "Stair Strips" and replaced the torn livewell handles with a button kit from Home Depot and lengths of excess transom strap. Just need a finishing strip for the carpet line.
Thinking about painting it with the DuPont paint (above) to have it look like fiberglass. For now, it's good.