Map PIM Data to Specific Excel Files Fields

I have a set of customer-supplied Excel templates that must be populated with the full breadth of information already stored in our PIM exports (they come to me as regular CSV / XLS files). Right now the... (Budget: $250 - $750 USD, Jobs: Data Analysis, Data Cleansing, Data Entry, Data Extraction, Data Management, Data Processing, Excel, Excel Macros, Excel VBA, Visual Basic)