Triplets with tremolo sighn

Hi everybody, I'm trying to write and arrange a song of Beethoven: Adelaide Op.46. The original tempo at the beginning is 4/4 and the accompagnement uses triplets. At the example I attach you can see that Beethoven notes the triplets with tremolo sign like they had been 12/8. Is there a way to write this in the exact way Beethoven did with Musescore?