Lid P/N: 3464 or 3471
Lid Size: 19.25 X 9"
Tank Size: 18.375" x 8.5"
The 3464 and 3471 tank lids are interchangeable. However, the 3464 and 3471 tanks are not interchangeable.
This item has been completely discontinued by the manufacturer and is rarely in stock. If you are unable to find it, the manufacturer recommends replacing the entire tank with the Vortens 3412 Tank, which is available under the related items tab below. The tank is fairly easy to swap out with just two bolts and a supply line to mess with. It's not as simple as just replacing the tank lid, but at least you can salvage your toilet bowl and not worry about floor tile issues, wax rings, noxious smells, etc.