Sales Invoice final receivable

Hi,

I need to make XML-Port export where I could see sales invoices which have been finally received today (invoice number and receivable date). It's possible to start with G/L Register (where I can see creating date) then next datasource should be Customer Ledger Entry records and then next datasource Detailed Customer Ledger Entry records. Then I have to check if this is the final receivable and then export it. Is it possible to find the final payment using some shorter way.

Thanks in advance,
Anti