Exporting reports with datasource details

[g.denyer]

I develop and test reports using a MySQL database which I publish to my JasperServer which has a datasource setup to point to the MySQL database.

Some of my clients use a SQL Server database with exactly the same structure and have a datasource with the same name setup, but using a SQL Server JDBC driver. 

Whenever I export the reports out of my server all of the datasource details is included even though I have unticked 'Data Souces' in the 'Resources to Export' section, so when the client imports them then thir SQL Server driver is swapped to the MySQL driver.

Is there anyway the reports can reference the data source by name but NOT export the full data source details?

Thanks.