Allergy free Christmas chocolates?

My grandson is allergic to corn (corn syrup) and eggs. He’s mildly allergic to peanuts and almonds but a trace of those is acceptable. I’m specifically trying to find chocolate advent calendars that are safe for him. I’m thinking that if I find some not made in the US or China my chances are better but I can’t seem to find (online) any with ingredient lists.
I know that many jellies are fantastic googlers. Can anyone help me find what I need?