While I don't know how to get these on the open market, But I know that when I was working with my father in his factory, that we would get these catalogs full of different types shipping supplies.
One item that I notice when ever I read these were the
Impact Labels – ShockWatch
http://www.lamerholm.com/p81/Impact-...93-ShockWatch/
if you have ever seen Deadliest Warrior you might recognize them.
as they would use them when doing test with explosive.
Any ways, I was thinking that they could be use as weak spot indicators.
An you just slap on a few on the areas that you want your boss to be vulnerable and if the Impact label is trip. you can call it a kill.
But you might want to test them out a bit, as I am not sure which label would work best.