picker77, If you have not found a shell for the forge, I used a water heater tank. I strip the outer sheet metal and insulation off then cut both the length you want from the top of the water tank. The top dome is then removed. Split the tube you have just made down the middle. 2 ratch straps will pull it down to the size you want and then weld into place. Cut the top dome to fit the new size of tube that was created. This will be the rear of the forge. Insulate and cast as instructed elsware. As a bonus the rest of the tank (it will be to long) can be left as is to use as a slack tub.