I found a cheaper version
http://www.tamperseal.com/luggage-seals-c-25.html here. It's of course much simpler but if you tie the zipper around a handle I doubt anyone can enter into your luggage undetected. Or you can (from the same site) buy some serious lock slap it on a Pelican case and then...
http://photography-on-the.net/forum/...d.php?t=910667