Tikka makes a 6.5x55 in left hand, but Beretta USA does not import it so I, Living in the U.S. can not get it. If you live in the states, then you can only get what Beretta USA imports from Tikka, as they are the sole distributors for Sako and Tikka.
I'm stuck on the same boat as you. I want a left handed 6.5x55. Beretta does not feel it is not necessary to import it in that caliber and yours either.