Does anyone know where I can get a tank that's bigger than 40 gallons? I feel like the tank is too small in length, however if I go with a 75 gallon tank it ends up being too narrow. Any ideas would be greatly appreciated! Or does anyone have any suggestions on the best size. Our bearded dragon is possibly 3-4 years old, not sure because I forgot when we purchased him, but he seems to be growing still and I wanted to expand his tank so he can "stretch his legs".