I ran across another source for metallized (aluminized) paper. When having my afternoon snack of Pepperidge Farms cookies, I noticed that the inside liner of the package was aluminized paper. After carefully cutting open the packaging, I had an approximately letter-sized sheet of very thin, aluminized paper just perfect for laminating to cardstock. Only downside is that the paper has a waffle pattern lightly embossed into it. (Upside, perfect if one wishes to construct a political platform.) It may be possible to iron it out....however, she-who-must-be-obeyed threatens instant death if I come within 10 feet of her steam iron (she never is going to forget a slight mishap with iron-on transfers).