if you search worldwide, under rock shox paris, there are two for sure.  One NOS(in CA) and one in Italy-used but a long 230 steerer tube.   The NOS one is a shorter steerer.  
As for the length, it depends on the head tube.   I have a 180 head tube on one bike and can run the 230.  They also did a 260mm threaded steerer and a 265 threadless alloy steerer tube.  The threaded, it was available in a steel and ti steerer.  They look identical on certain ones.  A bright ti looking color.  You actually have to have someone check with a magnet to make sure its ti or not.  I bought one recently that the guy said it was ti and it was steel.  The last one I just bought he said its ti.  not sure yet as I just bought it and it hasn't arrived.   The other is a threadless alloy. 
Usually a headset is 35 to 40mm total stack.  A King is 33 to 38mm.   So depending on your head tube length, a 230mm steerer should work.