We can only guess until somebody from Titleist really answers this question.  But I would think that they don't manufacture left handed shafts... they would be basically the same, its the heads that are different.  The only concern is the "sleeve setting".

If you would look at the performance guide chart, the standard setting for right is A-1 and D-4 for left. Then A-3 (most draw) for both and C-1 (most fade) for both as well.

There are volumes of information on what I don't know about shafts, but I've never seen a fitter spend time searching a cart for the left handed shaft.  Left handed heads, OMG, yes.  I always thought it was the same shaft and that's why the adjustment tables for the sinister of us are the mirror image of the right handed settings.  I've caught fitters on adjusting based on the right-handed settings, but using the left-handed table works.

I do not think there is a shaft for right versus left. The surefit sleeve uses different settings depending on right or left hand, but it is the same sleeve.

The shafts for right and left handers are the same. The settings positions are different. D4 is the standard setting for a left hander.