Oscommerce, a working CVS export file for TNT courier - 2 corrections

I have a job on Oscommerce, a working CVS export file for TNT courier, I have to make 2 corrections, the first enter the quantity of products in the order, the second is more complex, the Italian provinces are written in full, for example Milan wants the acronym MI, the acronyms are not present in the database, it will be necessary to convert 107 province names into acronyms