[Benelli M1 Super 90 Ghost Ring Sight issue]

Anyone ever have this issue or have any suggestions??

[Benelli M1 Super 90 Ghost Ring Sight issue]

I’ve contacted Benelli and they were helpful but don’t have the part or schematic.

It’s for the pre-97 GRS 

[Benelli M1 Super 90 Ghost Ring Sight issue]

I have a Benelli M1 Super 90 tactical that had the windage screw shear on the rear ghost ring. I've heard this is a common issue. I'm really struggling to find a schematic or replacement part for this screw, even after contacting a number of places. I really don't want to buy the whole new sight if it can be avoided and would prefer not to go aftermarket, but I'm open to suggestions to get this gun back up and running.

Let me know your thoughts! Thanks

Pictures attached.