I've acquired a Black & Silver badge (896386; no manufacturer city) brass piccolo snare WITHOUT it's muffler assembly.

While trying to insert a spare 1960s Slingerland snare assembly that I have, the bottom tightning screw (with washer) that goes through the body of the snare it a smidge too large to fit the hole. I don't want to damage the brass exterior by drilling a larger hole if I don't have to. Any suggestions' even where I might pick up a newer Slingerland snare muffler unit with the smaller screw?

1) is this one of those 80s imported Slingerland snares?

2) anyone have a suggestion on the muffler issue?

cheers, jim