Unless someone just happened to "part out" one of those exact model Sauers you are askng about, NOBODY will have spart parts laying around in a parts bin. Mark at MBAB can quite likely make the part, as can most any machinist, gunsmith, but there will likely simply be no parts found. If by some freak chance you do find the part, it will indeed be the find of the century. Having said that, it is very simple to make them. I have done so on my lathe, and any qualified machinist can do so. NO, I have no time to take your job, sorry.