Maybe try any Italian Consulate-General, like the one in Boston. They can direct you to the right person:
600 Atlantic Avenue 17th floor
Boston, MA 02210
tel: +1 (617) 722-9201/02/03
fax: +1 (617) 722-9407
e-mail:
archivio.boston@esteri.it
Our offices are open to the public :
Monday - Tuesday - Wednesday - Friday: 9:00 a.m. - 12:00 p.m.
Thursday: 9:00a.m. - 12:00p.m./ 2:00 p.m. - 3:30p.m.