Looks like I might need to add some ingredients to clarify this one within the database structure, since aperitivo's are within the amaro classification. The original calls for Casoni Aperitivo 1814, not to be confused with Casoni Amaro (usually listed as "Casoni Heritage Amaro" in the U.S.) Various red/orange bitter aperitivo's are probably the closest subs for the 1814, since the 2024 London Spirits Competition taste panel description was "bitters that are delightful, with a perfect balance between sweetness and botanical complexity ending with a bitter note of bitter orange peel and cardamom."
Worked well with Gran Classico.