Need to add an attachment by default as part of PO Supplier Notification along with the PO PDF

Summary:

The client wants to add the Business Information for E- Invoicing purpose attachment as a default attachment to the PO Supplier Notification along with the PO PDF.

This attachment is common for all the POs and hence doesn't want to explicitly attach to each PO under notes and attachment by selecting category type as "To Supplier".

This should be there by default in the PO Supplier Notification similar to PO PDF document.

Is there any means to default an attachment to the PO Supplier Notification similar to he PO PDF? Please advise on the same

Content (please ensure you mask any confidential information):