Although the outfit is in Austria, you may try http://www.eschoder.com/english/english-index.htm

they show a part A0390074 "Sicherungshebel" or wing safety, which is a replacement part equivalent to the existing safety.

Ask them what they could do to make it clear the scope.

I have dealt with them in the past and though a bit pricey, they come through with what they say they will.