OMG just had to reply to this, having read two pages of excuses, here's the facts, some may find them painful, unfortunately there is no easy cure. If the Lord has deemed that you have a right master eye, the gun has to be mounted on the right shoulder and, in consequence, the right eye sits down the rib line of your gun. If you are left eye dominant, then the gun has to be shot from the left shoulder, obviously leaving the left eye looking down the rib of the gun. To shoot with a shotgun you require both eyes open. If you disagree with this, try catching a ball with one eye closed, or driving a car. Can it be done? Obviously, yes and many do, however, just imagine just how good these one eyed shooters would be if they used both eyes. Is there any merit in these shooting aids - easy hit and dots? Yes, there is, it allows weak people who will not change to the other shoulder an opportunity to shoot slightly better than they were previously however, if you wish to do the job properly, change shoulders. Is there an easy route? No. Can you buy a solution? No. Sorry, the truth hurts.
Regards, Sage