I'm sure the materials could be found in your area. Any metal fabricator will sell you scrap, or let you look through their dumpster. All the other components can be found at a leather store near you. Try Tandy Leather (I'm partial to them as I have friends that work there ).
If you don't have a Tandy Leather nearby, I've ordered from Brettun's Village (
http://www.brettunsvillage.com/leather/) quite a few times. I just got a big hunk of deliciously flavored cow skin, I mean, leather, from them yesterday, actually. As a bonus, they have punches, grommets, and misc fittings and other cool stuff to take away your money, too.