Great job on the vest Brad, Looks really good!
I'm not on my own computer at the moment so i can't post pics, but i always thought the vest that McClane wears when he first goes underground and notices the heist has taken place would be a great one to own. It has some distinctive blood markings on the back close to the shoulder area.
Its just after the elevator shoot scene, hence the blood. You should have a crack at that one too and rotate them! May aswell as they're very inexpensive to buy.
I made a couple for a fancy dress party i went to (Wearing the original did cross my mind, for half a second!) i found that boot polish worked well for the markings, and i picked up some fake blood in a tube for the blood spots.
The main thing i noticed when i got my screen used vest was the discolouring, the vest i have he wears in the chase scene when it is raining heavily, and because it has been wet and dried a few times, its gone a musky grey colour. You could always stick it out on the line for a few days and see what happens! (Interestingly, there is a distinct line where the vest goes from dirty to clean from where Willis had it tucked into his trousers!)
Simon