Recently picked up a 1903a3 and looking to change out the peep sight thats on it. The rear peep hole is way to big and looking for a smaller one. Needs to be same mounting using the dovetail groove. Will not drill or tap shit in the the receiver. Looking at the WGRS as an option, are they still out there or hard to come by. Is there a company who offers a sight for the 1903a3 still.