I use lead foil, for straps or cloth, in various scales. I also use aluminum foil for some applications.
I get lead foil from various sources, all of it through scavenging, I refuse to pay for a package of lead foil, when I can bum leftover X-ray wrapping from my dentist, or ask my friends to save foil from the bottles of wine that they drink. My aluminum foil I salvage from my kitchen use, and from my sweet tooth.
Your crack about weapons of mass destruction suggests that you're concerned about getting lead poisoning from using lead foil, and let me say that you shouldn't have any problem, unless you do something stupid like eat it.
Prost!
Brad