Single invoice for more than 1000 Billing items

Hi,

We have below requirement:

We are doing RRB (Resource Related billing). We create thousands of Debit memo request for the customer. Each Debit memo has atleast 9 items. that means  in total we have 9000 items to bill in single invoice. We know that there are SAP limitations of 999 items in Invoice (billing doc type ZF1 ).

Is there any workaround that i still print all the line items in Single invoice. without disturbing below:

1. FICO Posting

2. Invoice Corrections/Cancellation/reversals

3. Reporting.