I need some gun locks - the cable kind that goes through the action. I probably need at least ten. Anyone know of a good, cheap source? The Beaverton PD gave some away a few years now but are not doing it now (that I know of). projectchildsafe.org does not list them as participating. I can always google around but thought maybe someone here had an idea. Another important question: other than marking each lock/key pair with a Sharpie, is there a good system or trick to reduce the number of keys needed?