Invoice Import To Create Sage Invoices

Each month I perform an invoice run of around 200-250 invoice from a third party system. Once completed, I use an upload file to get the details into Sage 200, and update the relevant Customer accounts, however these records are purely financial. Given the information used in upload, can we have it so that invoices can be created in Sage 200, so if I need copies etc., I have access like I would if I had created the invoice/credit directly in Sage.