Toto makes insulated tanks for the Drake model.
The tank for that would be the ST743SD.
I don't know that you need the insulated tank tough.
Since it's a 1.6 gallon toilet, it uses just some of the water in the tank.
Unless you flush it three times real quick, you won't be draining the water out all at once. The water that stays with the tank should become warmer than the water from the tap.
This anti-sweat valve works with all toilets.Condensation occurs when warm, moist air comes in contact with a colder surface.