I haven't had Bigallet, but perhaps Amaro Ramazzotti is available in your area. I suggest it because Ramazzotti is the basis for a recipe to make 'old' Amer Picon. I don't have a local source for contemporary Amer Picon either.
Yes thanks Werd. Love Ramazzotti. Haven't had it in a while. Perhaps it's time to get some. Cheers!