I was wondering the same thing.  I looked on golfsmith.com and it seems the raw black and tour chrome are the two left handed finishes.... It seems the best finish (black nickel for the sm4 and gold nickel for the sm5) are never offered in left hand.  I'm also shocked to see that the 60.04 finish (L grind) isn't popping up in any finish for left hand for the SM5.  That's by far the best grind for me so I'm hoping it's just missing on the golfsmith website.