Within the reports extracts you can generate a whole range of reports to support your business. Some of them available in the clients reports include the ability to extract data off the sub records of the client, i.e. the funding sources. 

When you include the columns for the sub table of funding sources, you must also tick the box to Breakdown By Funding Source. This will result in the client appearing in the report as many times as they have funding sources, so you will be able to extract the detail on the sub table for funding source. See Screenshots below.