Was going to suggest a concrete or drywall mixing tub, but those seem to top out at 36" too. Can't find a picture, but when I built a smitty, I made mine extra wide so that I had a space for my hub to sit outside the tub. The tub fit everything else, would think a hard rod case like one of the eagle claws could fit where I have my hub. I just added some eyebolts so I could tie down with bungees, quick and easy.