Well all versions of the Tavor can be the lefty version with a minor mod, as it of course has a blocked out ejection port for that purpose. I think what we're saying is no need to wait for one configured as lefty to purchase, simply buy the right hand version, shoot and enjoy it, and convert when practical.
Ya I know it can be changed. If I was a lefty I'd want it from the factory as a lefty. But buying the right hand model and getting the left bolt would be a lot easier to resell if you wanted to at some point