Go over to the PGCA site and see if one of the guys can bring to the top the thread on fixing up split stock heads. You do it with a wire staple drilled and epoxied across the split. Invisible when the stock is on the gun. From the pictures you post, it looks like the stock needs a good soaking in Wonko's brew to get the crud and oil out before attempting the repair. Maybe not, but I'm no gunsmith. Good luck.