I lived in Brescia province, I'm italian and I could tell you Silvana that it's more unprobably that you and leaslie are related. Bagolino and Cossirano, Brenzano, Palazzolo are too distant from them.
Scalvi is a different surname and not a mistake of Scalvini. Both of them are typical Brescia's surname.
If you know the right place of birth of the person that you named in post I could help you to have a copy of documents from the office.
I leave you my email address. I do this work a lot of time.