Does the portable's lock slot differ from either the Mac desktop units (like the Plus) or the laptop units (which some had a small hole that a keylock would fit into). I do have the lock clamps for a Mac Plus, and I believe it was the same as for any other desktop mac. Its a little metal bar that slips into the lock slot and snaps behind the tabs built into the case so it can't be removed. Then a cable slides thru the hole in the bar and is wrapped around and locked to any secure object. I used it to secure one of my Mac Pluses when my wife (then GF) borrowed one while in college. IF this is the same as for the Portable, then I have at least one lock plate still (it should still be in the keyboard that was used with the plus), but I'm sure I no longer have any packaging or documentation for it, and I may or may not still have additional plates or the cable. -chris <http://www.mythtech.net>