Metal Litter Boxes?

My chin has taken to chewing on his litter box when he wants to come out of his cage and since it's plastic, I really need to get a new one. Has anyone heard of metal litter boxes or what do you use for a litter box?



Also, side note, does anyone else have a super demanding chin? When he wants out, he wants out. Even if I'm sleeping, he'll start chewing the cage doors and the litter box. He's a pest... but I suppose that's what you get for loving a chinchilla :P