Its called Staballoy(possible mispelling) in sail boat keels

[cyphrpnk]

Hi Lucky,
       went looking myself once so I could machine some .308 bt  in DU
found it in an industrial catalogue catering to the large oceangoing
sailboat industry... this was circa 1986... if I would still interested that
is where I would start my research...(i.e. lee lapin and scott french(
"whole spy cataloge, bigbrother game" etc ) is where I got that hint...

     cheers
      a cypherpunk