Almost any stock manufacturer can make a stock for a lefty, assuming you're talking about a 90% pre-turned stock.. I'd call Wenigs in Lincoln Missouri or GreatAmericanGunstocks, they're in California I believe. Both have websites and a Google on gunstock makers will provide links to many more.. The correct nomenclature for the rifle is M1917, the P14 is the British designation for the rifle in 303 caliber. In any case good luck..