How to make an note to suppplier attachment default on all PO documents

Hello,

We are on 12.2.3 and have a requirement that a certain note to supplier text(long text) should default on all PO documents(pdf).We cannot make this as part of  a template since this text is Inv ORG specific.

Is there a way to do this without the buyer having to manually select this attachment on the PO and without having it to add it on every item in the item master?

Thanks

rahul