Add lines to an existing Oracle EBS AR invoice through AutoInvoice

Team,

Have a requirement to add additional lines into the same AR invoice.

Let us say that a Sales Order X has 2 lines.

1st line ships on let us say 22nd July - This creates an AR invoice.

2nd line ships on let us say 27th July - Would like to get added to the same AR invoice created for the 1st line.

The business requirement is to account (create accounting entries and post to GL without any delay) for the 1st line as and when it is shipped and not wait until the 2nd line till it gets shipped, but still the customer has to receive only one invoice for those 2 shipments....