Thunder Effect (Salzedo Marking)

Hi,

I’m trying to achieve the marking here for a thunder effect on Harp. This is from the Salzedo book; Dorico has the thunder symbol in the pitched percussion menu, but I can’t figure out a non-futzy way to achieve the line/arrow situation inside the pitches. Any thoughts?

I think the only way would be to edit one of the tremolos or the z symbol in Library->Music Symbols.

Jesper