Replacement for a cookie tin in a cookie tin banjo?

I've wanted to build a cookie tin tenor banjo for a while ( for those of you who don't know what it is its a homemade banjo with like a christmas cookie tin for a body) only problem is I can't find any cookie tins anywhere. Is there anything I can use as a replacement? Or alternate materials? I don't have the equipment to make one from wood and buying a tenor banjo isn't exactly a viable option either.