Qualification Area documents not visible in other BU's

Can some supplier documents be maintained across BU's after receiving the responses from supplier eg: FSC is a global document and whether users across different BU's can view and access them.

Currently we are able to view the documents only specific to that BU where we launched the qualifications, but our Client is looking for options so that the documents be used across different BU's.

Note : We enabled the Global BU option in the Qualification Area setups, but it doesn't show the supplier responses/documents in all the BU's, but only the qualification area can be used in the enabled BU's.