Is there a way to change the supplier precedence for IDR?

Summary:

For IDR invoices, the supplier precedence is:

1. PO Number: IDR derives the supplier from the PO number detected on the invoice.
2. Supplier Number in Email Subject: IDR detects a valid supplier number in the email subject.
3. Supplier Detection: IDR matches supplier name, address, and other identifying information to detect the supplier.

For PO matched invoices, is it possible to change the supplier precedence so that Supplier Number in Email Subject takes precedence over the PO Number? The business reason is - we get hundreds of invoices per month for brokerage invoices. The invoice itself is a non-PO matched invoice, however it lists the the PO number the brokerage fees relate to on the invoice. The invoice is to be paid to a brokerage firm, not to the supplier on the PO. The IDR picks up the PO number and the supplier from the PO but this is incorrect. We would like