I also need this piece, exactly as pictured by Mr Maybach back in 2004. Looks like I'll be searching junkyards. Or maybe I'll try my luck with a Dremel tool on a scrap of 6061 aluminum. Won't be pretty, but might work.

And a comment to mespe's solution above: There's 10 or 12 wafer tumblers. Usually several will fit whatever key you have. They just need to be rearranged into the appropriate slots. Leave out the ones that don't fit, or file them down until they do. Even just one tumbler will keep a screwdriver from working, though trivial for a lock-pick.