I think these rifles were built to fit everyone, wearing from little to full armor and even heavy battle attire. They shoulder quickly, hot weather to cold weather. They were designed to fight with outside or in close quarters. Same as the AKM-47 platforms around the world. Length of pull goes out the window. With a red dot or holo scope sight, or even without, they were made for fast target acquisition. They were not made to extend away from the body
like a 28" 12 gauge that fits your length of pull. They take a little getting used to, but it is worth it.
Know a man with an 8' wingspan that wants to buy one. Told him he would be better off with a .338 Lapua Magnum or a .50 cal. That way, he could learn how important each shot is. He is a massive man, so the recoil should not bother him. He's a special young man that wants to join his friends at the range to shoot with.
Kvar makes the Warsaw Pact and the NATO length stocks for the AK, but they are still both shorter than what you seek. Sometimes special people need special items, so maybe someone like Kvar would try to help you out if you spoke with them. There are many manufacturers out there that have most likely dealt with the same situation before. If my friend decides on an AR, I feel we may have to go looking, too. Good luck to you.