Thanks for the ideas.
I googled metal and I'm going to try embossing soda can metal. There was a great You Tube video showing this. I love it when the supplies are free (lol).
I've used Oriental Trading. Their shipping is really slow and they and they no longer offer free shipping to APOs, so I rarely use them. But I'll check their site.
I also just ordered a roll of aluminum tape from Amazon; I saw that on You Tube too.
I'll sign up for 2 slots and maybe another one later.